1. Southwest Minzu Univ, Sch Chem & Environm, Key Lab Gen Chem, Natl Ethn Affairs Commiss, Chengdu 610041, Sichuan, Peoples R China
折叠
Abstract
Improving the CO2 selectivity of ethanol oxidation reaction (EOR) is a crucial research topic right now. Rh could effectively break the C-C bond of ethanol, nevertheless, pristine Rh still exhibit negligible EOR activity due to the poisoning effect of C1 intermediates. To solve it, here we fabricate modified Rh interfaces with highly-dispersive Bi(OH)(3) species as directed by the Langmuir-Hinshelwood Mechanism, the strong interaction be-tween Rh and Bi(OH)(3) could provide the so-called electronic effect and bifunctional effect. Thus it facilitates the C-C bond cleavage at Rh sites and the electrooxidation of as-generated C1 intermediates even at low over-potentials. Eventually, the optimal Rh-Bi(OH)(3) catalysts show an apparent C1 pathway faraday efficiency of 26.2% at 0.67 V vs. RHE, the EOR mass activity of ca. 3500 mA mg(-1 Rh)and 10-hour-long durability. This work could provide an insightful and promising route in promoting the CO2 selectivity of EOR with high activity and long stability.
NSTL
Elsevier