| Amorphous multi-elements electrocatalysts with tunable bifunctionality toward overall water splitting | |
| Wang, Xiaomei1,2; Ma, Weiguang1; Ding, Chunmei1; Xu, Zhiqiang1,2; Wang, Hong1,2; Zong, Xu1; Li, Can1 | |
| 刊名 | Acs catalysis
 |
| 2018-11-01 | |
| 卷号 | 8期号:11页码:9926-9935 |
| 关键词 | Multi-elements electrocatalyst Electrodeposition Hydrogen evolution Oxygen evolution Overall water splitting |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.8601839 |
| 通讯作者 | Zong, xu(xzong@dicp.ac.cn) ; Li, can(canli@dicp.ac.cn) |
| 英文摘要 | Economically producing hydrogen via electrocatalytic water splitting requires highly efficient and low-cost catalysts and scalable synthetic strategies. herein, we present the preparation of hierarchically structured multi-elements water splitting electrocatalysts consisting of fe, co, ni, s, p, and o with a one-step electrodeposition method. by tuning of the non-metal compositions of the catalysts, the electrochemical performances of the catalysts for both the oxygen evolution reaction (oer) and the hydrogen evolution reaction (her) in 1 m koh can be rationally modified, respectively. under the optimum conditions, current densities of 100 and 1000 ma cm(-2) were obtained at overpotentials of only 135 and 264 mv on the her catalyst and 258 and 360 mv on the oer catalyst, respectively. when the best-performing her and oer catalysts were assembled in a two-electrode system for overall water splitting, a current density of 10 ma cm(-2) could be obtained under a cell voltage of 1.46 v with longterm durability. as far as we know, this is among the lowest voltages ever reported for a two-electrode electrolyzer based upon earth-abundant, elements. moreover, the catalysts can be facilely assembled on commercially available ni mesh and demonstrate even higher performance, indicating their great potential for scaled-up water electrolysis. we further demonstrate that s and p play different and pivotal roles in modifying the apparent and intrinsic electrocatalytic activity of the as-prepared amorphous electrocatalysts, therefore pointing out a pathway toward the optimization of multi-elements catalysts. |
| WOS关键词 | HYDROGEN-EVOLUTION REACTION ; OXYGEN EVOLUTION ; HIGHLY EFFICIENT ; ALKALINE ELECTROLYTES ; DOUBLE HYDROXIDE ; LOW-COST ; OXIDATION ; CATALYSTS ; NICKEL ; COBALT |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000449723900003 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2373097 |
| 专题 | 大连化学物理研究所 |
| 通讯作者 | Zong, Xu; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Collaborat Innovat Ctr Chem Energy Mat iChEM, State Key Lab Catalysis,Dalian Inst Chem Phys, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xiaomei,Ma, Weiguang,Ding, Chunmei,et al. Amorphous multi-elements electrocatalysts with tunable bifunctionality toward overall water splitting[J]. Acs catalysis,2018,8(11):9926-9935. |
| APA | Wang, Xiaomei.,Ma, Weiguang.,Ding, Chunmei.,Xu, Zhiqiang.,Wang, Hong.,...&Li, Can.(2018).Amorphous multi-elements electrocatalysts with tunable bifunctionality toward overall water splitting.Acs catalysis,8(11),9926-9935. |
| MLA | Wang, Xiaomei,et al."Amorphous multi-elements electrocatalysts with tunable bifunctionality toward overall water splitting".Acs catalysis 8.11(2018):9926-9935. |
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