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WOx‐Surface Decorated PtNi@Pt Dendritic Nanowires as Efficient pH‐Universal Hydrogen Evolution Electrocatalysts
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-11-30 , DOI: 10.1002/aenm.202003192 Weiyu Zhang 1 , Bolong Huang 2 , Kai Wang 1 , Wenxiu Yang 1 , Fan Lv 1 , Na Li 3, 4 , Yuguang Chao 1 , Peng Zhou 1 , Yong Yang 1 , Yingjie Li 1 , Jinhui Zhou 1 , Wenshu Zhang 1 , Yaping Du 4 , Dong Su 3 , Shaojun Guo 1, 5, 6
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-11-30 , DOI: 10.1002/aenm.202003192 Weiyu Zhang 1 , Bolong Huang 2 , Kai Wang 1 , Wenxiu Yang 1 , Fan Lv 1 , Na Li 3, 4 , Yuguang Chao 1 , Peng Zhou 1 , Yong Yang 1 , Yingjie Li 1 , Jinhui Zhou 1 , Wenshu Zhang 1 , Yaping Du 4 , Dong Su 3 , Shaojun Guo 1, 5, 6
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The hydrogen evolution reaction (HER) is a pivotal element of electrochemical water splitting which is able to produce clean hydrogen as an alternative to fossil fuel. Developing efficient Pt‐based electrocatalysts for the HER to work at all pHs is highly desirable, however, still a significant challenge, especially in alkaline conditions due to sluggish water dissociation and OHad transfer. Here, a new strategy for making a class of amorphous WOx‐surface decorated PtNi@Pt dendritic nanowires (WOx‐PtNi@Pt DNWs) to achieve highly efficient pH‐universal HER electrocatalysis is reported. The as‐made WOx‐PtNi@Pt DNWs display superior HER performance with the overpotentials of 24, 5, and 22 mV in 0.1 m KOH, 0.1 m HClO4, and 0.5 m phosphate‐buffered saline, respectively, at a current density of 10 mA cm−2. The mass activity of WOx‐PtNi@Pt DNWs in alkaline conditions is 3.3 mA μgPt−1 at an overpotential of 70 mV, among the best in all the reported materials. Theoretical calculations confirm the introduction of WOx to the PtNi DNWs plays a pivotal role in promoting the efficient electron transfer for the alkaline and acidic HER. The activation of the PtNi region within the PtNiWO interface is achieved by the WOx induced strain effect, which guarantees the superior performance in the HER.
中文翻译：
WOx表面修饰的PtNi @ Pt树枝状纳米线是有效的pH值通用的析氢电催化剂
析氢反应（HER）是电化学水分解的关键要素，它能够产生清洁的氢作为化石燃料的替代品。在所有pH为HER开发高效的基于铂电催化剂工作是非常可取的，但是，仍然有显著的挑战，特别是由于低迷的水离解和OH碱性条件下的广告转移。在此，报道了一种新的策略，该策略可用于制造一类无定形WO x表面修饰的PtNi @ Pt树枝状纳米线（WO x‐ PtNi @ Pt DNWs），以实现高效的pH通用HER电催化。制成的WO x ‐PtNi @ Pt DNW在0.1 m KOH，0.1 m KOH中具有24、5和22 mV的过电势，显示出卓越的HER性能。m HClO 4和0.5 m磷酸盐缓冲盐水，电流密度分别为10 mA cm -2。的WO质量活性X -PtNi @铂DNWs在碱性条件下是3.3毫安微克的Pt -1处的超电势70毫伏，之中在所有报告的材料的最佳。理论计算证实WO x引入PtNi DNWs在促进碱性和酸性HER的有效电子转移中起着关键作用。的PtNi区域的铂内的激活镍 W¯¯ O接口由WO实现X 诱导的应变效应，保证了HER的卓越性能。
更新日期：2021-01-20
中文翻译：
WOx表面修饰的PtNi @ Pt树枝状纳米线是有效的pH值通用的析氢电催化剂
析氢反应（HER）是电化学水分解的关键要素，它能够产生清洁的氢作为化石燃料的替代品。在所有pH为HER开发高效的基于铂电催化剂工作是非常可取的，但是，仍然有显著的挑战，特别是由于低迷的水离解和OH碱性条件下的广告转移。在此，报道了一种新的策略，该策略可用于制造一类无定形WO x表面修饰的PtNi @ Pt树枝状纳米线（WO x‐ PtNi @ Pt DNWs），以实现高效的pH通用HER电催化。制成的WO x ‐PtNi @ Pt DNW在0.1 m KOH，0.1 m KOH中具有24、5和22 mV的过电势，显示出卓越的HER性能。m HClO 4和0.5 m磷酸盐缓冲盐水，电流密度分别为10 mA cm -2。的WO质量活性X -PtNi @铂DNWs在碱性条件下是3.3毫安微克的Pt -1处的超电势70毫伏，之中在所有报告的材料的最佳。理论计算证实WO x引入PtNi DNWs在促进碱性和酸性HER的有效电子转移中起着关键作用。的PtNi区域的铂内的激活镍 W¯¯ O接口由WO实现X 诱导的应变效应，保证了HER的卓越性能。
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