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MoSe2 nanosheet/MoO2 nanobelt/carbon nanotube membrane as flexible and multifunctional electrodes for full water splitting in acidic electrolyte†
Nanoscale ( IF 5.8 ) Pub Date : 2018-04-23 00:00:00 , DOI: 10.1039/c8nr01572d L. J. Yang 1, 2, 3, 4, 5 , Y. Q. Deng 5, 6, 7, 8, 9 , X. F. Zhang 3, 10, 11, 12, 13 , H. Liu 1, 2, 3, 4, 10 , W. J. Zhou 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-04-23 00:00:00 , DOI: 10.1039/c8nr01572d L. J. Yang 1, 2, 3, 4, 5 , Y. Q. Deng 5, 6, 7, 8, 9 , X. F. Zhang 3, 10, 11, 12, 13 , H. Liu 1, 2, 3, 4, 10 , W. J. Zhou 1, 2, 3, 4, 5
Affiliation
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Acid-stable and efficient hydrogen evolution reaction (HER) catalysts have been widely reported. However, achieving full water splitting catalysis in acidic electrolytes is still an urgent task due to the lack of efficient, abundant and acid-stable oxygen evolution reaction (OER) catalysts. This rationally designed MoSe2 nanosheet/MoO2 nanobelt/carbon nanotube membrane (MoSe2 NS/MoO2 NB/CNT-M) is composed of highly conductive CNTs and hierarchical MoSe2 nanosheets on MoO2 nanobelts, and due to its flexible three-dimensional (3D) electrodes, possesses an open architecture for rapid ion/electron diffusion, maximising the exposure of its active sites. The MoSe2 NS/MoO2 NB/CNT-M achieved remarkable electrocatalytic performance for the HER, providing a geometrical current density of 1 mA cm−2 at an onset potential of −23 mV vs. RHE, a small Tafel slope (69.4 mV dec−1) and excellent long-cycle stability in 0.5 M H2SO4. More importantly, the obtained multifunctional electrodes delivered excellent electrocatalytic activity towards the OER under acidic conditions, with a very small onset potential (≈+1.43 V vs. RHE) and enhanced long-cycle durability. The two-electrode electrolyzer, composed of a MoSe2 NS/MoO2 NB/CNT-M both as an anode and a cathode, required a small voltage of 1.63 V to achieve 10 mA cm−2 and improved electrocatalytic durability, which was better than that of an electrolyzer composed of RuO2//20 wt% Pt/C. This work highlights the potential for active and abundant non-precious catalysts for full water splitting in acidic electrolytes.
中文翻译：
MoSe 2纳米片/ MoO 2纳米带/碳纳米管膜作为可弯曲的多功能电极，可在酸性电解质中完全水分解†
酸稳定和有效的析氢反应（HER）催化剂已被广泛报道。然而，由于缺乏有效，丰富和酸稳定的析氧反应（OER）催化剂，在酸性电解质中实现完全的水分解催化仍然是紧迫的任务。这种经过合理设计的MoSe 2纳米片/ MoO 2纳米带/碳纳米管膜（MoSe 2 NS / MoO 2 NB / CNT-M）由高导电性CNT和MoO 2纳米带上的分层MoSe 2纳米片组成，并且由于其柔性的三尺寸（3D）电极具有开放式结构，可快速进行离子/电子扩散，从而最大化其活性位点的暴露。MoSe 2NS / MoO 2 NB / CNT-M对HER具有出色的电催化性能，在相对于RHE的起始电势为−23 mV时提供1 mA cm -2的几何电流密度，小的Tafel斜率（69.4 mV dec -1）和在0.5 MH 2 SO 4中优异的长周期稳定性。更重要的是，所获得的多功能电极在酸性条件下对OER表现出出色的电催化活性，具有非常小的起始电势（≈R. 1.43 V vs. RHE），并具有长周期耐久性。由MoSe 2 NS / MoO 2组成的两电极电解槽NB / CNT-M作为阳极和阴极，都需要1.63 V的小电压才能达到10 mA cm -2并改善电催化耐久性，这比由RuO 2 // 20 wt％Pt组成的电解槽要好。/C。这项工作强调了活性和丰富的非贵金属催化剂在酸性电解质中完全水分解的潜力。
更新日期：2018-04-23
中文翻译：
MoSe 2纳米片/ MoO 2纳米带/碳纳米管膜作为可弯曲的多功能电极，可在酸性电解质中完全水分解†
酸稳定和有效的析氢反应（HER）催化剂已被广泛报道。然而，由于缺乏有效，丰富和酸稳定的析氧反应（OER）催化剂，在酸性电解质中实现完全的水分解催化仍然是紧迫的任务。这种经过合理设计的MoSe 2纳米片/ MoO 2纳米带/碳纳米管膜（MoSe 2 NS / MoO 2 NB / CNT-M）由高导电性CNT和MoO 2纳米带上的分层MoSe 2纳米片组成，并且由于其柔性的三尺寸（3D）电极具有开放式结构，可快速进行离子/电子扩散，从而最大化其活性位点的暴露。MoSe 2NS / MoO 2 NB / CNT-M对HER具有出色的电催化性能，在相对于RHE的起始电势为−23 mV时提供1 mA cm -2的几何电流密度，小的Tafel斜率（69.4 mV dec -1）和在0.5 MH 2 SO 4中优异的长周期稳定性。更重要的是，所获得的多功能电极在酸性条件下对OER表现出出色的电催化活性，具有非常小的起始电势（≈R. 1.43 V vs. RHE），并具有长周期耐久性。由MoSe 2 NS / MoO 2组成的两电极电解槽NB / CNT-M作为阳极和阴极，都需要1.63 V的小电压才能达到10 mA cm -2并改善电催化耐久性，这比由RuO 2 // 20 wt％Pt组成的电解槽要好。/C。这项工作强调了活性和丰富的非贵金属催化剂在酸性电解质中完全水分解的潜力。
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