文献类型：期刊文献

英文题名：Mo6+ activated multimetal oxygen-evolving catalysts

作者：Liu, Peng Fei[1];Yang, Shuang[1];Zheng, Li Rong[4];Zhang, Bo[2,3];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[3]Univ Toronto, Dept Elect & Comp Engn, 35 St George St, Toronto, ON M5S 1A4, Canada;[4]Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

年份：2017

卷号：8

期号：5

起止页码：3484

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20172703896636);WOS:【SCI-EXPANDED(收录号:WOS:000400553000021)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21573068, 21503079), SRF for ROCS, SEM, SRFDP, Program of Shanghai Subject Chief Scientist (15XD1501300), Shanghai Municipal Natural Science Foundation (14ZR1410200), Fundamental Research Funds for the Central Universities (WD1313009) and 111 Project (B14018). The authors also thank the crew of the 1W1B beamline of Beijing Synchrotron Radiation Facility for constructive assistance in the XANES measurements and data analyses.

语种：英文

外文关键词：Glass membrane electrodes - Reaction kinetics - Transition metals - Iron alloys - Electronic structure - Iron compounds - Oxygen

摘要：Water splitting is key to electrically-powered chemical fuel synthesis, but the slow kinetics of the oxygen evolution reaction (OER) hinder the wider promotion of such technology. Several first-row (3d) transition metal-based catalysts have been developed for the OER; however, these catalysts still require operating voltages that lie well above the fundamental thermodynamic potential. Here, we report high-valence metal molybdenum (Mo6+) modulated 3d metal (oxy) hydroxides. The obtained multimetal FeCoMo based OER catalysts require an overpotential of 277 mV to reach the current density of 10 mA cm(-2) on the glassy carbon electrode, and there was no evidence of degradation for about 40 hours of stability testing. The catalysts stay in their amorphous phases, potentially with atomically homogenous metal distribution. The in situ X-ray adsorption analysis unambiguously reveals the tuned electronic structures of the 3d metals owing to Mo6+, further demonstrating the modification effect of a high-valence metal for designing highly-efficient OER catalysts.