Polyoxometalate derived p-n heterojunction for optimized reaction interface and improved HER

被引：0
|
作者：
Xiaoli Cui [1 ]
Yunmeng Sun [1 ]
Xinxin Xu [1 ,2 ]
机构：
[1] Department of Chemistry, College of Science, Northeastern University
[2] Institute for Frontier Technologies of Low-Carbon Steelmaking, Northeastern University
来源：
Chinese Chemical Letters | 2023年 / 34卷 / 03期
基金：
中国国家自然科学基金;
关键词：
D O I：
暂无
中图分类号：
TQ116.2 [氢气]; TQ426 [催化剂（触媒）];
学科分类号：
080502 ; 0817 ; 081705 ;
摘要：
MoS2is a typical electrocatalyst for hydrogen evolution reaction(HER),but the HER activity is spoilt by intensive adsorption towards H*,which requires further improvement.For n-type MoS2,the construction of p-n heterojunction with p-type MoO3can reverse this situation,because inner electronic field in p-n heterojunction can facilitate H*desorption.Based on this hypothesis,p-n heterojunction is built between MoS2and MoO3with polyoxometalate compound as precursor.The obtained MoO3/MoS2exhibits excellent HER activity,which only requires 68 mV to obtain 10 mA/cm2.With MoO3/MoS2as cathode material and Zn slice as anode,Zn-H+battery is assembled.Its open circuit voltage achieves 1.11 V with short circuit current 151.4 mA/cm2.The peak power density of this Zn-H+battery reaches 47.6 mW/cm2.When discharge at 10 mA/cm2,the specific capacity and energy density reach 728 mAh/g and 759 Wh/kg.In this process,H2production rate of Zn-H+battery achieves 364μmol/h with Faradic efficiency 97.8%.It realizes H2production and electricity generation simultaneously.
引用
收藏
页码：523 / 526
页数：4
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