Interface-Synergistically Enhanced Acidic, Neutral, and Alkaline Hydrogen Evolution Reaction over Mo2C/MoO2 Heteronanorods
Interface-Synergistically Enhanced Acidic, Neutral, and Alkaline Hydrogen Evolution Reaction over Mo2C/MoO2 Heteronanorods
复制标题
Mo2C/MoO2 杂棒上的界面协同增强酸性、中性和碱性析氢反应
DOI：
10.1021/acssuschemeng.8b03026
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发表时间：
2018-11-05
影响因子：
8.4
通讯作者：
Huang, Xingliang
中科院分区：
文献类型：
--
作者：
Liu, Mengzhao;Yang, Yang;Huang, Xingliang
水电解法是实现可持续制氢的一种很有前途的方法，它在工业上的应用很大程度上依赖于高效的电催化剂。本文采用简单的自模板碳热还原法制备了Mo2C/MoO2杂多棒。通过控制热解温度，优化的Mo2C/MoO_2-650异质棒在0.5M H_2SO_4、0.1M PBS和1.0KOH中表现出较低的过电位(168、290和204 mV)以获得10 mA·cm~(-2)的电流密度，并且具有较小的塔菲尔斜率(∼58和87 mV dec-1)、高质量活度(在η=200 mA时分别为115.4和33.8A·g~(-1))和在0.5M H_2SO_4和1.0KOH中优异的稳定性。这种优异的性能主要归功于Mo2C和MoO2之间的异质界面促进了协同效应，准一维纳米结构促进了快速电荷/质量转移，以及高的电化学活性表面积(ECSA)提供了大量的可用位。这个.。
Water electrolysis provides a promising way to achieve sustainable hydrogen production, which strongly depends on highly effective electrocatalysts for industrial application. Herein, Mo2C/MoO2 heteronanorods have been synthesized by means of a simple self-templated carbothermal reduction of polymolybdate-melamine precursor. Through manipulating the pyrolysis temperature, the optimal Mo2C/MoO2-650 heteronanorods show a low overpotential (168, 290, and 204 mV) to achieve current density of 10 mA cm–2 in 0.5 M H2SO4, 0.1 M PBS, and 1.0 KOH, respectively, which also presents a small Tafel slope (∼58 and 87 mV dec–1), high mass activity (115.4 and 33.8 A g–1 at η = 200 mA), and outstanding stability in 0.5 M H2SO4 and 1.0 KOH. The superior performance is mainly ascribed to the heterointerfaces between Mo2C and MoO2 promoting synergistic effects, quasi 1D nanostructures facilitating fast charge/mass transfer, and high electrochemical active surface area (ECSA) providing a large number of available sites. This ...