文献类型：期刊文献

英文题名：Unravelling electrocatalytic concerted diatomic-ensembles over superior hydrogen-evolution array structured by NiMo/Mo2N heteronanojunctions

作者：Jia, Huanli[1,2];Wang, Haiyan[1];Zhang, Hucheng[1];Li, Ze[1];Wang, Jianji[1]

第一作者：Jia, Huanli;贾焕丽

通讯作者：Wang, HY[1];Zhang, HC[1];Wang, JJ[1]

机构：[1]Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China;[2]Xinxiang Univ, Coll Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China.

年份：2024

卷号：343

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20234114864186);Scopus(收录号：2-s2.0-85173750674);WOS:【SCI-EXPANDED(收录号:WOS:001136558600001)】；

基金：This work is supported by the National Natural Science Foundation of China (21573059 and 22208088) .

语种：英文

外文关键词：Hydrogen evolution reaction; Concerted diatomic electrocatalysis; Heteronanojunction array; Surface reconstruction; Ensemble effect

摘要：The concerted catalysis throughout multiple elementary steps is key to impel sluggish hydrogen evolution re-action (HER). Herein, NiMo/Mo2N/NC(500-R) array is constructed by embedding densely packed NiMo/Mo2N heterojunctions into nanorod skeleton of nitrogen-rich derived carbons (NC), then followed by electrochemical surface reconstruction. The great electrochemical surface area of resultant electrocatalyst implies fully-exposed concerted diatomic-ensembles. The ensemble effect of unique heteronanojunction induces charge polarizations between Mo and Ni species, gives pseudocapacitance comparable to supercapacitors, and pumps mass transfers to refresh entire HER process. The exceptional activity is demonstrated by ultra-low overpotentials of 5.8 and 200.6 mV respectively at 10 and 1000 mA cm-2, the impressive durability is indicated by lasting alkaline HER for 1000 h at 1 A cm-2. Moreover, the performances in water-alkali electrolyzer outperform most reported catalysts. This work presents valuable insights into concerted catalysis and designing efficient and durable electrocatalysts by ensemble effect from different metal heterojunctions for commercial applications.