Platinum on nitrogen doped graphene and tungsten carbide supports for ammonia electro-oxidation reaction

Siddharth, Kumar1; Wang, Yian1; Wang, Jing1,2; Xiao, Fei1; Nambafu, Gabriel Sikukuu1; Bin Shahid, Usman1; Yang, Fei1,2; Delmo, Ernest Pahuyo1; Shao, Minhua1,3,4

2022-03-01

10.1007/s11705-021-2130-2

Frontiers of Chemical Science and Engineering   影响因子和分区

2095-0179

2095-0187

Ammonia electrooxidation reaction involving multistep electron-proton transfer is a significant reaction for fuel cells, hydrogen production and understanding nitrogen cycle. Platinum has been established as the best electrocatalyst for ammonia oxidation in aqueous alkaline media. In this study, Pt/nitrogen-doped graphene (NDG) and Pt/tungsten monocarbide (WC)/NDG are synthesized by a wet chemistry method and their ammonia oxidation activities are compared to commercial Pt/C. Pt/NDG exhibits a specific activity of 0.472 mA.cm(-2), which is 44% higher than commercial Pt/C, thus establishing NDG as a more effective support than carbon black. Moreover, it is demonstrated that WC as a support also impacts the activity with further 30% increase in comparison to NDG. Surface modification with Ir resulted in the best electrocatalytic activity with Pt-Ir/WC/NDG having almost thrice the current density of commercial Pt/C. This work adds insights regarding the role of NDG and WC as efficient supports along with significant impact of Ir surface modification.

Ammonia electro-oxidation reaction electrocatalyst supports platinum nitrogen doped graphene tungsten carbide

SCI ; EI

英语

其他

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[SMSEGL20SC01] ; Innovation and Technology Commission of the Hong Kong Special Administrative Region[ITC-CNERC14EG03]

Engineering

Engineering, Chemical

WOS:000765729900002

SPRINGER

20221011759397

Alkalinity ; Ammonia ; Carbon black ; Doping (additives) ; Electrocatalysts ; Electrooxidation ; Fuel cells ; Hydrogen production ; Platinum compounds ; Tungsten carbide

Gas Fuels:522 ; Fuel Cells:702.2 ; Nanotechnology:761 ; Chemistry, General:801.1 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Hong Kong, Peoples R China
2.South Univ Sci & Technol China, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Hong Kong Univ Sci & Technol, Southern Marine Sci & Engn Guangdong Lab Guangzho, Hong Kong, Peoples R China
4.Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Control & Treatment Hea, Hong Kong, Peoples R China

Siddharth, Kumar,Wang, Yian,Wang, Jing,et al. Platinum on nitrogen doped graphene and tungsten carbide supports for ammonia electro-oxidation reaction[J]. Frontiers of Chemical Science and Engineering,2022,16:930-938.

Siddharth, Kumar.,Wang, Yian.,Wang, Jing.,Xiao, Fei.,Nambafu, Gabriel Sikukuu.,...&Shao, Minhua.(2022).Platinum on nitrogen doped graphene and tungsten carbide supports for ammonia electro-oxidation reaction.Frontiers of Chemical Science and Engineering,16,930-938.

Siddharth, Kumar,et al."Platinum on nitrogen doped graphene and tungsten carbide supports for ammonia electro-oxidation reaction".Frontiers of Chemical Science and Engineering 16(2022):930-938.