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Electron Irradiation Induces the Conversion from 2H-WSe2 to 1T-WSe2 and Promotes the Performance of Electrocatalytic Hydrogen Evolution
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-02-08 , DOI: 10.1021/acssuschemeng.1c07179 Xiaoqing Yue 1 , Jianqun Yang 1 , Weiqi Li 2 , Yuhang Jing 3 , Lei Dong 1 , Yubao Zhang 4 , Xingji Li 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-02-08 , DOI: 10.1021/acssuschemeng.1c07179 Xiaoqing Yue 1 , Jianqun Yang 1 , Weiqi Li 2 , Yuhang Jing 3 , Lei Dong 1 , Yubao Zhang 4 , Xingji Li 1
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Hydrogen (H2) is an environment-friendly clean energy. In recent years, novel hydrogen evolution electrocatalysts have attracted extensive attention in the scientific community. In this work, the conversion of 2H phase tungsten selenide (2H-WSe2) into 1T phase tungsten selenide (1T-WSe2) was induced by 1 MeV electron irradiation to improve its electrocatalytic performance. When the irradiation fluence is 5 × 1014 e/cm2, the minimum initial overpotential of WSe2 is 101 mV lower than the initial overpotential of WSe2 without irradiation. This method has the characteristics for a simple process and mass production. At the same time, the atomic structure of WSe2 was characterized and the 1T properties of WSe2 were confirmed. The experimental results show that 1 MeV electron irradiates WSe2 to produce Se vacancies on the base surface to form 1T-WSe2, which is the main reason for improving its performance. This effective and feasible electron irradiation method provides a new strategy for the controllable acquisition of 1T-WSe2 and a new method for other similar materials to introduce the ideal 1T phase.
中文翻译：
电子辐照诱导 2H-WSe2 转化为 1T-WSe2 并促进电催化析氢性能
氢（H 2）是一种环境友好的清洁能源。近年来，新型析氢电催化剂引起了科学界的广泛关注。在这项工作中， 1 MeV 电子辐照诱导2H 相硒化钨 (2H-WSe 2 ) 转化为 1T 相硒化钨 (1T-WSe 2 ) 以提高其电催化性能。当辐照能量密度为5×10 14 e/cm 2时，WSe 2的最小初始过电势比未辐照的WSe 2的初始过电势低101 mV 。该方法具有工艺简单、可大量生产的特点。同时，WSe的原子结构对2进行了表征，并证实了 WSe 2的 1T 特性。实验结果表明，1 MeV电子辐照WSe 2在基体表面产生Se空位形成1T-WSe 2，这是提高其性能的主要原因。这种有效可行的电子辐照方法为1T-WSe 2的可控获取提供了新的策略，也为其他类似材料引入理想的1T相提供了新的方法。
更新日期：2022-02-08
中文翻译：
电子辐照诱导 2H-WSe2 转化为 1T-WSe2 并促进电催化析氢性能
氢（H 2）是一种环境友好的清洁能源。近年来，新型析氢电催化剂引起了科学界的广泛关注。在这项工作中， 1 MeV 电子辐照诱导2H 相硒化钨 (2H-WSe 2 ) 转化为 1T 相硒化钨 (1T-WSe 2 ) 以提高其电催化性能。当辐照能量密度为5×10 14 e/cm 2时，WSe 2的最小初始过电势比未辐照的WSe 2的初始过电势低101 mV 。该方法具有工艺简单、可大量生产的特点。同时，WSe的原子结构对2进行了表征，并证实了 WSe 2的 1T 特性。实验结果表明，1 MeV电子辐照WSe 2在基体表面产生Se空位形成1T-WSe 2，这是提高其性能的主要原因。这种有效可行的电子辐照方法为1T-WSe 2的可控获取提供了新的策略，也为其他类似材料引入理想的1T相提供了新的方法。
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