Ultra-low Au decorated PtNi alloy nanoparticles on carbon for high-efficiency electro-oxidation of methanol and formic acid
Ultra-low Au decorated PtNi alloy nanoparticles on carbon for high-efficiency electro-oxidation of methanol and formic acid
复制标题
碳载超低金修饰 PtNi 合金纳米颗粒用于甲醇和甲酸的高效电氧化
DOI：
10.1016/j.ijhydene.2020.06.164
复制
发表时间：
2020-09-03
影响因子：
7.2
通讯作者：
Chen，Bing Hui
中科院分区：
文献类型：
--
作者：
Pei，An;Ruan，Luna;Chen，Bing Hui
我们提供了一种简单的方法，设计和制备了一种高效的Pt10.9Au0.2Ni88.9/C三金属纳米催化剂，该催化剂具有超低（0.075 wt%） Au修饰的PtNi合金纳米颗粒纳米结构，用于甲醇氧化（MOR）和甲酸氧化（FAOR）。Pt10.9Au0.2Ni88.9/C对MOR和FAOR的电催化性能远优于Pt11.1Ni88.9/C、Au11.1Ni88.9/C和商用Pt/C，这是由于Pt、Au和Ni之间的协同效应（Au和Ni对Pt的电荷供体效应）。它改变了铂原子的表面电子结构。此外，Ni触发了向Pt和Au原子的重排，可以最大限度地利用贵金属。表面修饰的金原子有利于OHadsas的形成，也有利于减弱COadsat铂活性位点的吸附。Pt10.9Au0.2Ni88.9/C催化剂在MOR和FAOR过程中也表现出优异的稳定性。采用一系列表征技术揭示了Pt10.9Au0.2Ni88.9/C的纳米结构、电子和表面活性位点性质。
We provide a simple method to design and prepare a highly efficient Pt10.9Au0.2Ni88.9/C trimetallic nanocatalyst with a novel nanostructure of ultra-low (0.075 wt%) Au decorated PtNi alloy nanoparticles for methanol oxidation (MOR) and formic acid oxidation (FAOR). The electro-catalytic properties of Pt10.9Au0.2Ni88.9/C toward the MOR and FAOR are much more excellent than Pt11.1Ni88.9/C, Au11.1Ni88.9/C and commercial Pt/C, which is attributable to the synergy effect among Pt, Au, and Ni (electron charge donor effect of Au and Ni to Pt). It has transformed the surface electronic structure of Pt atoms. Moreover, Ni triggers the rearrange towards Pt and Au atoms, it could maximize the use of noble metals. The gold atoms decorated on the surface are conducive to the formation of OHadsas well as to weaken the adsorption of COadsat platinum active sites. The Pt10.9Au0.2Ni88.9/C catalyst also exhibits outstanding stability during the MOR and FAOR. A series of characterization techniques are adopted to reveal the nanostructures, electronic, and surficial active sites properties of Pt10.9Au0.2Ni88.9/C.