文献类型：期刊文献

英文题名：Easy access to trace-loading of Pt on inert Ni₃N nanoparticles with significantly improved hydrogen evolution activity at entire pH values

作者：Wang, Changding[1,2];Sun, Yifan[1,2];Tian, Enlin[1,2];Fu, Dongmei[1,2];Zhang, Min[3];Zhao, Xiaojuan[4];Ye, Weichun[1,2]

第一作者：Wang, Changding

通信作者：Ye, WC[1];Ye, WC[2]

机构：[1]Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China;[2]Lanzhou Univ, Dept Chem, Lanzhou 730000, Gansu, Peoples R China;[3]Lanzhou Univ, Sch Stomatol, Lanzhou 730000, Gansu, Peoples R China;[4]Gansu Univ Chinese Med, Coll Pharm, Lanzhou 730000, Gansu, Peoples R China

第一机构：Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China

通信机构：[1]corresponding author), Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Gansu, Peoples R China;[2]corresponding author), Lanzhou Univ, Dept Chem, Lanzhou 730000, Gansu, Peoples R China.

年份：2019

卷号：320

外文期刊名：ELECTROCHIMICA ACTA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000483341100057)】；

基金：This work is supported by the Fundamental Research Fund for the Central Universities (Nos. lzujbky-2017-k9 and lzujbky-2017-144) and the Natural Science Foundation of Gansu Province, China (Nos. 17JR5RA209 and 1610RJZA071).

语种：英文

外文关键词：Hydrogen evolution reaction; Trace loadings; Inert Ni3N nanoparticles; Platinum; Galvanic replacement

摘要：Compared with 2D metallic Ni3N nanosheets as a potential alternative to Pt-based catalyst, Ni3N nanoparticles exhibit inert electrocatalytic hydrogen evolution reaction (HER) activity due to their poor conductivity. In this work, we demonstrated that the HER activity of inert Ni3N nanoparticles could be significantly improved through high dispersion of trace-loaded Pt on their surface. In detail, Ni3N/Ni@C with controllable Ni content was prepared via the urea-urea-glass-route by controlling the calcination temperature and time based on the thermal unstability of Ni3N. Followed by the galvanic replacement between Ni and a platinum precursor, Ni3N/Ni@C decorated with a trace amount (0.45 wt%) of Pt was simply prepared. The trace-loaded catalyst exhibited greatly enhanced HER activity and stability in entire pH range including in 0.5 M H2SO4, 1.0 M KOH and 0.2 M PBS (pH = 7), which could be comparable to commercial Pt/C (20 wt%) catalyst. For example, they held low overpotential of 117 mV at 10 mA/cm(2), small Tafel slope of 47.3 mV/dec, and large electrochemical surface area of 60.24 mF/cm(2) in 0.5 M H2SO4. The present work provides an intriguing strategy for developing trace loadings of noble metal electro-catalysts on inert materials with high HER performance. (C) 2019 Elsevier Ltd. All rights reserved.