Hierarchical MoS2 nanoflowers on carbon cloth as an efficient cathode electrode for hydrogen evolution under all pH values
Hierarchical MoS2 nanoflowers on carbon cloth as an efficient cathode electrode for hydrogen evolution under all pH values
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碳布上的分层 MoS2 纳米花作为高效阴极电极，可在所有 pH 值下析氢
DOI：
10.1016/j.ijhydene.2018.04.226
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发表时间：
2018
影响因子：
7.2
通讯作者：
Shi Weidong
中科院分区：
文献类型：
--
作者：
Mao Baodong;Wang Bo;Yu Furong;Zhang Kewei;Zhang Zhengyuan;Hao Jinhui;Zhong Junbo;Liu Yanhong;Shi Weidong
本文研究了一种简单的水热合成策略，以扩大碳布（CC）上的层间距的mos2纳米花作为宽pH条件下析氢反应（HER）的高效阴极电极。结果表明，MoS2的负载量对HER性能有重要影响，优化后的MoS2/CC在强酸溶液（pH = 0）中具有较低的起效电位（94 mV）和较小的Tafel斜率（50 mV dec−1）。XRD和HRTEM结果表明，小尺寸二硫化钼纳米片的层间间距增大，缺陷丰富，活性位点暴露。同时，它在碱性和中性条件下也表现出较好的HER性能，过电位为188 （pH = 14）和230 (pH = 7) mV，电流密度为10 mA cm−2，Tafel斜率分别为52和84 mV dec−1。
In this paper, a facile hydrothermal synthetic strategy was developed for MoS2nanoflowers with enlarged interlayer spacing on the carbon cloth (CC) as a high efficiency cathode electrode for hydrogen evolution reaction (HER) under wide pH condition. It was observed that the loading amount of MoS2has a major impact on the HER performance, where the optimized MoS2/CC exhibited a low onset potential of 94 mV and a small Tafel slope of 50 mV dec−1in strong acid solution (pH = 0). The improved HER performance can be contributed to the enlarged interlayer spacing, abundant defects and more exposed active sites in the small size MoS2nanosheets as revealed by XRD and HRTEM. Meanwhile, it also exhibited relatively good performance for HER under basic and neutral conditions with the overpotentials of 188 (pH = 14) and 230 (pH = 7) mV to achieve current density of 10 mA cm−2and the Tafel slopes of 52 and 84 mV dec−1, respectively.