Details

Autor(en) / Beteiligte

• Luo, Fang
• Zhang, Quan
• Yu, Xinxin
• Xiao, Shenglin
• Ling, Ying
• Hu, Hao
• Guo, Long
• Yang, Zehui
• Huang, Liang
• Cai, Weiwei
• Cheng, Hansong

Titel

Palladium Phosphide as a Stable and Efficient Electrocatalyst for Overall Water Splitting

Ist Teil von

• Angewandte Chemie International Edition, 2018-11, Vol.57 (45), p.14862-14867

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A palladium phosphide electrocatalyst supported on carbon black (PdP2@CB) shows efficient water splitting in both alkaline and neutral electrolytes. Significantly lower overpotentials are required for PdP2@CB (27.5 mV in 0.5 m H2SO4; 35.4 mV in 1 m KOH; 84.6 mV in 1 m PBS) to achieve a HER electrocatalytic current density of 10 mA cm−2 compared to commercial Pt/CB (30.1 mV in 0.5 m H2SO4; 46.6 mV in 1 m KOH; 122.7 mV in 1 m PBS). Moreover, no loss in HER activity is detectable after 5000 potential sweeps. Only 270 mV and 277 mV overpotentials are required to reach a current density of 10 mA cm−2 for PdP2@CB to catalyze OER in 1 m KOH and 1 m PBS electrolytes, which is better OER activity than the benchmark IrO2 electrocatalyst (301 mV and 313 mV to drive a current density of 10 mA cm−2). 1.59 V and 1.72 V are needed for PdP2@CB to achieve stable water splitting catalytic current density of 10 mA cm−2 in 1 m PBS and 50 mA cm−2 in 1 m KOH for 10 h, respectively. Low‐voltage splitting: A palladium phosphide electrocatalyst supported on carbon black (PdP2@CB) exhibits superior electrocatalytic activity toward water splitting in alkaline and neutral electrolytes. Significantly lower overpotential is required for PdP2@CB to achieve a water splitting electrocatalytic current density of 10 mA cm−2 compared to commercial Pt/CB||IrO2.