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Recent advances of hydrogen production through particulate semiconductor photocatalytic overall water

《能源前沿(英文)》 2022年 第16卷 第1期   页码 49-63 doi: 10.1007/s11708-022-0817-9

摘要: Solar energy-driven photocatalytic water splitting has been investigated for decades to produce clean and renewable green hydrogen. In this paper, the cutting-edge research within the overall water splitting system is summarized from the one-step photocatalytic overall water splitting (POWS) system to the two-step system and the cocatalysts research in this field. In addition, the photocatalytic reaction engineering study is also reviewed which is crucial for future scale-up. This mini-review provides a picture of survey of recent progress of relevant overall water splitting system, with particular attention paid to material system and mechanistic breakthroughs, and highlights the challenge and opportunity of the current system.

关键词: photocatalysis     overall water splitting     hydrogen    

Facile route to achieve MoSe-NiSe on nickel foam as efficient dual functional electrocatalysts for overall

《能源前沿(英文)》 2022年 第16卷 第3期   页码 483-491 doi: 10.1007/s11708-022-0813-0

摘要: Since the catalytic activity of present nickel-based synthetic selenide is still to be improved, MoSe2-Ni3Se2 was synthesized on nickel foam (NF) (MoSe2-Ni3Se2/NF) by introducing a molybdenum source. After the molybdenum source was introduced, the surface of the catalyst changed from a single-phase structure to a multi-phase structure. The catalyst surface with enriched active sites and the synergistic effect of MoSe2 and Ni3Se2 together enhance the hydrogen evolution reactions (HER), the oxygen evolution reactions (OER), and electrocatalytic total water splitting activity of the catalyst. The overpotential of the MoSe2-Ni3Se2/NF electrocatalyst is only 259 mV and 395 mV at a current density of 100 mA/cm2 for HER and OER, respectively. MoSe2-Ni3Se2/NF with a two-electrode system attains a current density of 10 mA/cm2 at 1.60 V. In addition, the overpotential of HER and OER of MoSe2-Ni3Se2/NF within 80000 s and the decomposition voltage of electrocatalytic total water decomposition hardly changed, showing an extremely strong stability. The improvement of MoSe2-Ni3Se2/NF catalytic activity is attributed to the establishment of the multi-phase structure and the optimized inoculation of the multi-component and multi-interface.

关键词: three-dimensional molybdenum nanomaterials     hydrogen evolution reaction     oxygen evolution reaction     overall water splitting    

State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts

Bing LUO, Yuxin ZHAO, Dengwei JING

《能源前沿(英文)》 2021年 第15卷 第1期   页码 600-620 doi: 10.1007/s11708-021-0737-0

摘要: Converting solar energy into hydrogen (H ) by photocatalytic water splitting is a promising approach to simultaneously address the increasing energy demand and environmental issues. Half decade has passed since the discovery of photo-induced water splitting phenomenon on TiO photoanode, while the solar to H efficiency is still around 1%, far below the least industrial requirement. Therefore, developing efficient photocatalyst with a high energy conversion efficiency is still one of the main tasks to be overcome. Graphitic carbon nitride (g-C N ) is just such an emerging and potential semiconductor. Therefore, in this review, the state-of-the-art advances in g-C N based photocatalysts for overall water splitting were summarized in three sections according to the strategies used, and future challenges and new directions were discussed.

关键词: photocatalysis     overall water splitting     carbon nitride     hydrogen    

NiFeRuOx nanosheets on Ni foam as an electrocatalyst for efficient overall

《化学科学与工程前沿(英文)》 2023年 第17卷 第11期   页码 1698-1706 doi: 10.1007/s11705-023-2334-8

摘要: The electrocatalyst NiFeRuOx/NF, comprised of NiFeRuOx nanosheets grown on Ni foam, was synthesized using a hydrothermal process followed by thermal annealing. NiFeRuOx/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting: 98 mV@ 10 mA∙cm−2 in hydrogen evolution reaction, 318 mV@ 50 mA∙cm−2 in oxygen evolution reaction, and a cell voltage of 1.53 V@ 10 mA∙cm−2, as well as 20 h of durability. A solar-driven system containing such a bifunctional NiFeRuOx/NF has an almost 100% Faradaic efficiency. The NiFeRuOx coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

关键词: NiFeRuOx nanosheets     Ni foam     electrocatalysis     overall seawater splitting     solar-driven system    

论编制土地利用总体规划的动力周期和特性

李伯衡

《中国工程科学》 2007年 第9卷 第3期   页码 1-5

摘要:

编制土地利用总体规划是为全面建设小康社会提供用地保障,是国务院强化宏观调控的重要举措。 为了提高土地利用总体规划的科学性和实用性,从理论上论述了推进土地利用总体规划的三大动力——粮食安 全生产,经济稳定发展,生态保护、社会和谐;建议将土地利用总体规划按国民经济发展需要安排三种周期: 战略规划——中长期土地规划;战役规划——五年土地规划和国家五年计划相协调;战术规划——区域土地详 细规划。区域土地规划具有目的统一性、决策整体性、总量不变性、需求动态性等特征;为了建立土地利用长 效机制,制止乱占耕地,建议全国人大设立枟土地利用规划法枠、枟基本农田保护法枠,用地球观测技术建立基本 农田台帐,动态定位格网监管,向农民发耕地承包使用证。

关键词: 土地利用     总体规划     建议     动力     周期    

sub>S4 nanoparticles-anchored porous carbon nanofibers as bifunctional electrocatalyst for overall

《化学科学与工程前沿(英文)》 2023年 第17卷 第11期   页码 1707-1717 doi: 10.1007/s11705-023-2308-x

摘要: Water electrolysis technology is considered to be one of the most promising means to produce hydrogen. Herein, aiming at the problems of high overpotential and slow kinetics in water splitting, N-doped porous carbon nanofibers-coupled CoNi2S4 nanoparticles are prepared as bifunctional electrocatalyst. In the strategy, NaCl is used as the template to prepare porous carbon nanofibers with a large surface area, and sulfur vacancies are created to modulate the electronic structure of CoNi2S4. Electron spin resonance confirms the formation of abundant sulfur vacancies, which largely reduce the bandgap of CoNi2S4 from 1.68 to 0.52 eV. The narrowed bandgap is conducive to the migration of valence electrons and decreases the charge transfer resistance for electrocatalytic reaction. Moreover, the uniform distribution of CoNi2S4 nanoparticles on carbon nanofibers can prevent the aggregation and facilitate the exposure of electrochemical active sites. Therefore, the composite catalyst exhibits low overpotentials of 340 mV@100 mA·cm–2 for oxygen evolution reaction and 380 mV@100 mA·cm–2 for hydrogen evolution reaction. The assembled electrolyzer requires 1.64 V to achieve 10 mA·cm–2 for overall water-splitting with good long-term stability. The excellent performance results from the synergistic effect of porous structures, sulfur deficiency, nitrogen doping, and the well-dispersed active component.

关键词: nanoparticle     sulfur vacancy     porous carbon nanofiber     transition metal sulfides     electrolysis    

海上油田丛式井网整体加密调整技术研究

张凤久,罗宪波,刘英宪,赵春明

《中国工程科学》 2011年 第13卷 第5期   页码 34-40

摘要:

以绥中36-1为代表的海上稠油油田已经进入开发中后期,逐步暴露出注采矛盾突出、层间和平面上储量动用差异大、单井控制储量过高、采油速度和采收率较低、综合含水上升快,产量递减快等问题,针对中国海油稠油开发面临的挑战,首次提出海上油田大规模综合调整研究,由于海上油田特殊的开发方式,陆地油田综合调整工作中成熟的研究思路和技术路线无法复制到海上油田,海上油田整体加密调整技术研究面临诸多技术难点,因此,本次研究结合绥中36-1油田I期自身特点和开发方式,针对油田开发存在的问题,创新性地提出一整套海上油田的整体挖潜和调整的技术思路和研究方法,完成绥中36-1油田I期整体加密调整方案,调整后油田井网由反九点面积注水井网转变成为行列注水井网,探索“定向井+水平井”开发模式,整体加密实施效果良好,油田水驱状况明显改善,水驱储量动用程度从调整前的80.5 %提高到调整后的91.3 %,采收率大幅度提高,预计提高采收率10.4 %,整体加密调整技术必将在同类油田中推广应用。

关键词: 稠油油藏     整体加密     井网调整     水驱     数值模拟    

Diagnosis and recommendations for transjurisdictional water pollution management in China

WANG Yahua

《环境科学与工程前沿(英文)》 2007年 第1卷 第4期   页码 401-417 doi: 10.1007/s11783-007-0067-4

摘要: Large-scale water environmental deterioration is one of the most prominent environmental issues in current China. Transjurisdictional water pollution is an important reason for water environmental deterioration of river basins, and currently there are some major defects that exist in China s management system related to transjurisdictional water pollution. With seven major river basins in China as an object of study, this paper is designed to perform a diagnosis of major problems about the transjurisdictional water pollution management in China from three aspects, i.e. institution, mechanism, and legislation. On the basis of this, it gives an overall train of thoughts on the reform of transjurisdictional water pollution management in China, and proposes specific recommendations from the aforesaid three aspects.

关键词: overall     specific     management     Large-scale     legislation    

Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

《结构与土木工程前沿(英文)》 2015年 第9卷 第1期   页码 48-64 doi: 10.1007/s11709-014-0271-9

摘要: To improve the design methods of Chinese aluminum alloy members, experiment of 63 profiled aluminum alloy members, made of Chinese aluminum alloy 6061-T6, under axial compression is conducted in this paper. Valuable experimental data are obtained. At the same time, in order to obtain the relevant data, a large number of other experimental data from published papers and technical reports are collected and sorted out. 167 valid experimental data points are obtained finally. Furthermore, for the purpose of creating column curves, the aluminum alloy members under the axial compression, used in experiments, are analyzed by means of FEM. Based on the numerical results, 2 column curves are created by means of the numerical fitting method. The column curves are compared with the calculated data according to the experimental results for verification, and also are verified with the curves in design codes of several relevant countries. The numerical results show that the column curves obtained in this paper are valid and reliable.

关键词: aluminum alloy     column curve     compression members     overall stability coefficient    

Overall HIEs deconstruction method and its application

Li LIN, Chengqi XUE,

《机械工程前沿(英文)》 2009年 第4卷 第4期   页码 466-471 doi: 10.1007/s11465-009-0076-z

摘要: Based on the human interface elements (HIEs) as the emotional carriers, this paper researches the general analysis steps of hierarchical HIEs and puts forward a new systematical deconstruction method for Kansei engineering fields. A mobile phone is taken as the research subject, the emotional design rules are inferred based on the multiple-orientation information of human interfaces, and the emotional change law is grasped from a new perspective. The research on the deconstruction method promotes the study of Kansei engineering and is a significant guide and reference for the theory and practice of related product design fields.

关键词: product design     relationship model     human interface     design rules     emotion    

长江第一隧——武汉长江隧道修建技术

王梦恕,孙谋,谭忠盛

《中国工程科学》 2009年 第11卷 第7期   页码 11-17

摘要:

武汉长江隧道是长江上第一条江底隧道。隧道穿越的地质条件复杂,地层透水性强,水压高;盾构直径大,一次推进距离长;地面和地中环境复杂。介绍了武汉长江隧道工程研究与设计经过,工程建设模式,隧道的总体设计、施工概况。着重阐述了盾构的选型和沿线建筑物的保护技术。

关键词: 武汉长江隧道     建设模式     总体设计     施工    

300m 级特高拱坝建设关键技术与实践

王仁坤

《工程(英文)》 2016年 第2卷 第3期   页码 350-359 doi: 10.1016/J.ENG.2016.03.012

摘要:

中国于2000 年成功建设二滩拱坝( 高240 m)以来,至2014 年年底已建成7 座坝高超过200 m 的特高拱坝,其中锦屏一级拱坝(高305 m)、小湾拱坝(高294.5 m)、溪洛渡拱坝(高285.5 m)不仅坝高达300 m 级,而且因地质条件复杂,水推力巨大,抗震要求高,在安全控制技术等方面取得了新的突破。本文主要阐述300 m 级特高拱坝的基础可利用岩体及合理建基面、体形优化设计、安全设计准则、抗震研究与抗震措施、复杂地基的典型处理、混凝土及施工期温控防裂等关键技术。

关键词: 特高拱坝     优化设计     整体安全     抗震安全     混凝土温控    

人字型钢塔制造总体工艺设计

吉林,张永利

《中国工程科学》 2010年 第12卷 第4期   页码 43-47

摘要:

泰州大桥钢中塔首次采用纵向人字型钢塔结构,制造安装难度大,通过对钢混结合段、整体式塔柱节段、下塔柱合龙段等不同结构形式的钢塔节段的特点开展针对性分析,提出不同的钢塔节段制造工艺方案,并通过泰州大桥实践,为今后采用高强厚钢板、结构形式复杂的钢塔柱制造提供了借鉴及技术保障。

关键词: 板单元     块体     节段     钢塔柱     工艺设计    

Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer cell proliferation in vitro and in vivo

null

《医学前沿(英文)》 2016年 第10卷 第1期   页码 41-51 doi: 10.1007/s11684-016-0429-z

摘要:

Midline2 (MID2) is an ubiquitin-conjugating E2 enzyme linked to tumor progression and a novel interacting partner of breast cancer 1, early-onset (BRCA1). However, the role of MID2 in breast cancer remains unknown. This study investigated the expression, prognostic value, and role of MID2 in breast cancer. The expression of MID2 mRNA and protein was significantly upregulated in breast cancer tissue and established cell lines compared with that in normal breast epithelial cells and paired adjacent non-tumor tissue (P<0.001). Immunohistochemical analysis demonstrated that MID2 was overexpressed in 272 of 284 (95.8%) paraffin-embedded, archived breast cancer tissue. Moreover, MID2 expression increased with advanced clinical stage (P<0.001). High MID2 expression was significantly associated with advanced clinical stages and T, N, and M staging (all P<0.05). Univariate and multivariate analyses indicated that high MID2 expression was an independent prognostic factor for poor overall survival in the entire cohort (93.73 vs. 172.1 months; P<0.001, log-rank test) and in subgroups with stages Tis+ I+ II and III+ IV. Furthermore, 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide colony formation, and anchorage-independent growth ability assays were conducted. Results showed that siRNA silencing of MID2 expression significantly reduced MCF-7 and MDA-MB-231 cell proliferation in vitro and blocked the growth of MDA-MB-231 cell xenograft tumors in vivo (P<0.05). This study indicated that MID2 may be a novel prognostic marker and interventional target in breast cancer.

关键词: breast cancer     MID2     proliferation     overall survival     xenograft    

Bevacizumab in combination with pemetrexed and platinum for elderly patients with advanced non-squamous non-small-cell lung cancer: a retrospective analysis

《医学前沿(英文)》 2022年 第16卷 第4期   页码 610-617 doi: 10.1007/s11684-021-0827-8

摘要: Bevacizumab, an anti-VEGF monoclonal antibody, has significantly improved the clinical outcomes of patients with advanced non-squamous NSCLC (ns-NSCLC). However, the safety and efficacy of bevacizumab for elderly patients with advanced NSCLC require further investigation. Thus, 59 patients were included in the present retrospective study, 22 patients in the bevacizumab plus pemetrexed and platinum (B+PP) group, and 37 patients in the pemetrexed and platinum (PP) group. For the entire cohort of patients, the median OS was 33.3 months, and the 1-year and 2-year overall survival rates were 88.5% and 67.8%, respectively. The median OS and 1-year and 2-year OS rates were 20.5 months, 70.3% and 0%, respectively, in the B+PP group and 33.4 months, 97.0% and 89.4%, respectively, in the PP group (P <0.001). The incidence of grade≥3 adverse events was higher in the B+PP group than in the PP group (27.3% vs. 10.8%, respectively; P=0.204). Univariate and multivariate analyses suggested that the receipt of≥5 cycles of first-line chemotherapy was an independent favorable prognostic factor for OS, whereas the addition of bevacizumab was an unfavorable prognostic factor. With increased toxicities, the addition of bevacizumab to PP does not improve the overall survival of elderly patients with advanced ns-NSCLC.

关键词: bevacizumab     elderly patient     advanced non-small-cell lung cancer     overall survival     toxicity    

标题 作者 时间 类型 操作

Recent advances of hydrogen production through particulate semiconductor photocatalytic overall water

期刊论文

Facile route to achieve MoSe-NiSe on nickel foam as efficient dual functional electrocatalysts for overall

期刊论文

State-of-the-art progress in overall water splitting of carbon nitride based photocatalysts

Bing LUO, Yuxin ZHAO, Dengwei JING

期刊论文

NiFeRuOx nanosheets on Ni foam as an electrocatalyst for efficient overall

期刊论文

论编制土地利用总体规划的动力周期和特性

李伯衡

期刊论文

sub>S4 nanoparticles-anchored porous carbon nanofibers as bifunctional electrocatalyst for overall

期刊论文

海上油田丛式井网整体加密调整技术研究

张凤久,罗宪波,刘英宪,赵春明

期刊论文

Diagnosis and recommendations for transjurisdictional water pollution management in China

WANG Yahua

期刊论文

Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

期刊论文

Overall HIEs deconstruction method and its application

Li LIN, Chengqi XUE,

期刊论文

长江第一隧——武汉长江隧道修建技术

王梦恕,孙谋,谭忠盛

期刊论文

300m 级特高拱坝建设关键技术与实践

王仁坤

期刊论文

人字型钢塔制造总体工艺设计

吉林,张永利

期刊论文

Midline2 is overexpressed and a prognostic indicator in human breast cancer and promotes breast cancer cell proliferation in vitro and in vivo

null

期刊论文

Bevacizumab in combination with pemetrexed and platinum for elderly patients with advanced non-squamous non-small-cell lung cancer: a retrospective analysis

期刊论文