甲醇
铂金
氢氧化物
电催化剂
镍
石墨烯
材料科学
三元运算
催化作用
吸附
化学
电化学
化学工程
无机化学
纳米技术
有机化学
电极
工程类
物理化学
程序设计语言
计算机科学
作者
Wenjing Huang,Hongtao Wang,Jigang Zhou,Jian Wang,Paul N. Duchesne,David Muir,Peng Zhang,Ning Han,Feipeng Zhao,Min Zeng,Jun Zhong,Chuanhong Jin,Yanguang Li,Shuit‐Tong Lee,Hongjie Dai
摘要
Active and durable electrocatalysts for methanol oxidation reaction are of critical importance to the commercial viability of direct methanol fuel cell technology. Unfortunately, current methanol oxidation electrocatalysts fall far short of expectations and suffer from rapid activity degradation. Here we report platinum-nickel hydroxide-graphene ternary hybrids as a possible solution to this long-standing issue. The incorporation of highly defective nickel hydroxide nanostructures is believed to play the decisive role in promoting the dissociative adsorption of water molecules and subsequent oxidative removal of carbonaceous poison on neighbouring platinum sites. As a result, the ternary hybrids exhibit exceptional activity and durability towards efficient methanol oxidation reaction. Under periodic reactivations, the hybrids can endure at least 500,000 s with negligible activity loss, which is, to the best of our knowledge, two to three orders of magnitude longer than all available electrocatalysts.
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