Advanced ternary RGO/bimetallic Pt-Pd alloy/CeO2 nanocomposite electrocatalyst by one-step hydrothermal-assisted formic acid reduction reaction for methanol electrooxidation

被引：24
作者：
Hanifah, Mohamad Fahrul Radzi [1 ]
Jaafar, Juhana [1 ]
Othman, M. H. D. [1 ]
Ismail, A. F. [1 ]
Rahman, M. A. [1 ]
Yusof, N. [1 ]
Salleh, Wan Norharyati Wan [1 ]
Aziz, Farhana [1 ]
Ajid, Amy Zuria Abdul [2 ]
机构：
[1] Univ Teknol Malaysia, Pusat Penyelidikan Teknol Membran Termaju, Sekolah Kejuruteraan Kimia & Kejuruteraan Tenaga, Fak Kejuruteraan, Utm 81310, Johor, Malaysia
[2] Univ Teknol Malaysia, Makmal Penyelidikan Univ Ind, Bangunan T03, Utm 81310, Johor, Malaysia
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2021年 / 9卷 / 01期
关键词：
Nanocomposite; Reduced graphene oxide; Electrocatalyst; Electrocatalytic activity; Methanol electrooxidation; Direct methanol fuel cell; REDUCED GRAPHENE OXIDE; ENHANCED PHOTOCATALYTIC ACTIVITY; FACILE SYNTHESIS; ELECTRO-CATALYST; POTENTIAL ELECTROCATALYST; EFFICIENT ELECTROCATALYST; HIGH-PERFORMANCE; ANODE CATALYSTS; FLOWER-LIKE; NANOPARTICLES;
D O I：
10.1016/j.jece.2020.104991
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A facile, rapid, green, and novel clean synthesis of advanced RGO/bimetallic Pt-Pd alloy/CeO2 nanocomposite electrocatalyst with the enhanced electrocatalytic performance of methanol oxidation reaction (MOR) has been successfully carried out through a one-step hydrothermal-assisted formic acid reduction reaction without applying any template or surfactant. The as-prepared electrocatalysts were extensively characterized by X-ray Powder Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Energy Dispersive X-ray Spectroscopy (EDX), High-Resolution Transmission Electron Microscopy (HRTEM), and Field-Emission Scanning Electron Microscopy (FESEM) to confirm the formation, deposition and homogenous distribution of Pt-Pd alloy and CeO2 nanoparticles (NPs) on the surface of RGO. Meanwhile, the electrocatalytic activity and the long-term stability performance of the as-prepared electrocatalysts towards MOR were employed by cyclic voltammogram and chronoamperometry, respectively. Noticeably, the as-prepared RGO/bimetallic Pt-Pd alloy/CeO2 nanocomposite electrocatalyst presented very outstanding electrocatalytic performance with higher maximum forward peak current density (69.82 mA cm(-2)) than those of RGO/monometallic Pt/CeO2 (23.81 mA cm(-2)) and RGO/ monometallic Pd/CeO2 (1.39 mA cm(-2)) toward MOR in acidic medium denoting to the large surface area and excellent conductivity of RGO, homogenous distribution of Pt-Pd alloy electrocatalyst as well as a synergistic effect between Pt-Pd alloy NPs, RGO, and CeO2 NPs. Moreover, the RGO/bimetallic Pt-Pd alloy/CeO2 electrocatalyst also possesses excellent stability and exceptional poisoning tolerance through the advantages of utilizing Pt-Pd alloy NPs and the synergistic effect of CeO2 NPs. Therefore, this study may open a new facile route with the convenient experimental procedure, clean, reasonable cost, easy to handle, no time consuming, and easy to scaleup for the large quantity production of an advanced anode electrocatalyst for direct methanol fuel cell application.
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页数：17
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