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Binary Transition-Metal Oxide Hollow Nanoparticles for Oxygen Evolution Reaction
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2018-06-28 00:00:00 , DOI: 10.1021/acsami.8b06165 Pan Peng 1 , Xiao-Min Lin , Yuzi Liu , Alexander S. Filatov , Dongguo Li , Vojislav R. Stamenkovic , Dali Yang 1 , Vitali B. Prakapenka , Aiwen Lei 1 , Elena V. Shevchenko
ACS Applied Materials & Interfaces ( IF 9.5 ) Pub Date : 2018-06-28 00:00:00 , DOI: 10.1021/acsami.8b06165 Pan Peng 1 , Xiao-Min Lin , Yuzi Liu , Alexander S. Filatov , Dongguo Li , Vojislav R. Stamenkovic , Dali Yang 1 , Vitali B. Prakapenka , Aiwen Lei 1 , Elena V. Shevchenko
Affiliation
Low-cost transition metal oxides are actively explored as alternative materials to precious metal-based electrocatalysts for the challenging multistep oxygen evolution reaction (OER). We utilized the Kirkendall effect allowing the formation of hollow polycrystalline, highly disordered nanoparticles (NPs) to synthesize highly active binary metal oxide OER electrocatalysts in alkali media. Two synthetic strategies were applied to achieve compositional control in binary transition metal oxide hollow NPs. The first strategy is capitalized on the oxidation of transition-metal NP seeds in the presence of other transition-metal cations. Oxidation of Fe NPs treated with Ni (+2) cations allowed the synthesis of hollow oxide NPs with a 1–4.7 Ni-to-Fe ratio via an oxidation-induced doping mechanism. Hollow Fe–Ni oxide NPs also reached a current density of 10 mA/cm2 at 0.30 V overpotential. The second strategy is based on the direct oxidation of iron–cobalt alloy NPs which allows the synthesis of hollow FexCo100–x-oxide NPs where x can be tuned in the range between 36 and 100. Hollow Fe36Co64-oxide NPs also revealed the current density of 10 mA/cm2 at 0.30 V overpotential in 0.1 M KOH.
中文翻译:
用于氧释放反应的二元过渡金属氧化物空心纳米粒子
积极探索低成本过渡金属氧化物作为贵金属基电催化剂的替代材料,以应对具有挑战性的多步氧气析出反应(OER)。我们利用Kirkendall效应允许形成中空的多晶,高度无序的纳米粒子(NP),从而在碱性介质中合成高活性的二元金属氧化物OER电催化剂。应用了两种合成策略以实现对二元过渡金属氧化物空心NP的成分控制。第一种策略是利用在其他过渡金属阳离子存在下氧化过渡金属NP种子的方法。用Ni(+2)阳离子处理的Fe NP的氧化允许通过氧化诱导的掺杂机制合成Ni / Fe比为1-4.7的空心氧化物NP。2在0.30 V过电势下。第二种策略是基于铁-钴合金NP的直接氧化,可以合成中空的Fe x Co 100- x氧化物NP,其中x可以在36到100之间调节。中空的Fe 36 Co 64氧化物NPs还显示出在0.1 M KOH中的0.30 V过电势下的电流密度为10 mA / cm 2。
更新日期:2018-06-28
中文翻译:
用于氧释放反应的二元过渡金属氧化物空心纳米粒子
积极探索低成本过渡金属氧化物作为贵金属基电催化剂的替代材料,以应对具有挑战性的多步氧气析出反应(OER)。我们利用Kirkendall效应允许形成中空的多晶,高度无序的纳米粒子(NP),从而在碱性介质中合成高活性的二元金属氧化物OER电催化剂。应用了两种合成策略以实现对二元过渡金属氧化物空心NP的成分控制。第一种策略是利用在其他过渡金属阳离子存在下氧化过渡金属NP种子的方法。用Ni(+2)阳离子处理的Fe NP的氧化允许通过氧化诱导的掺杂机制合成Ni / Fe比为1-4.7的空心氧化物NP。2在0.30 V过电势下。第二种策略是基于铁-钴合金NP的直接氧化,可以合成中空的Fe x Co 100- x氧化物NP,其中x可以在36到100之间调节。中空的Fe 36 Co 64氧化物NPs还显示出在0.1 M KOH中的0.30 V过电势下的电流密度为10 mA / cm 2。