Efficient electrochemical ethanol-to-CO2 conversion at rhodium and bismuth hydroxide interfaces

Boosting ethanol electrooxidation at RhBi alloy and Bi2O3 composite surfaces in alkaline media

“…5000 mA mg −1 Rh at the RhBi–Bi 2 O 3 catalyst surface, being about 80 times and 2.5 times higher than that of the monometallic Rh/C catalyst and Pd/C-JM, respectively. 45,48 And when compared to previously reported data (Table S1†), it performs better than the most recently reported noble metal based catalysts. Meanwhile, the onset ethanol oxidation potential was around 160 mV lower than that of the Rh/C catalyst (Fig.…”

“…Electrochemical impendence spectra (EIS) were obtained by fitting a commonly adopted equivalent circuit at a 10 mV potential amplitude in the frequency range of 0.1–10 6 Hz at 0.65 V vs. RHE for RhBi–Bi 2 O 3 and Rh/C, and 0.7 V vs. RHE for Pd/C-JM, respectively. 48 The potential control and current recording were carried out on a CHI660E electrochemical workstation. All the electrolytes were freshly prepared using guarantee reagents (GRs) and ultrapure Milli-Q water (18.25 MΩ cm), and all measurements were carried out at room temperature.…”

Rhodium–Cobalt Alloy Nanotubes Toward Methanol Oxidation Reaction

“…Recent pioneering works have revealed that noble metal rhodium (Rh)‐based nanostructures possess excellent electroactivity for the oxidation reactions of various alcohols (such as methanol, [ 3 ] ethanol, [ 4 ] glycerol, [ 5 ] and formic acid [ 6 ] ), carbon monoxide reduction reaction, [ 7 ] hydrogen evolution reaction, [ 8 ] hydrazine oxidation reaction, [ 9 ] nitrogen reduction reaction, [ 10 ] and so on. Among these important electrochemical reactions, the MOR at Rh‐based electrocatalyst is attracting increased attention because the onset oxidation potential of MOR at Rh nanomaterials is much lower than that at Pt‐ and Pd‐based nanomaterials in alkaline media.…”

A novel bismuth hydroxide (Bi(OH)3) semiconductor with highly-efficient photocatalytic activity

“…Hydroxides, such as In(OH) 3 , 6 Mg(OH) 2 7 and Ni(OH) 2 , 8 with excellent photocatalytic reduction of CO 2 , have recently been reported. It was found that the surrounding O–O bridges and hydroxyl group sites not only are good adsorbents for adsorbing acidic gas CO 2 , 9 but also can facilitate the oxidative removal of carbonaceous species, such as CO. 10 Moreover, abundant oxygen vacancies (OVs) caused by alkaline conditions during synthesis and the relatively high conduction band provide the necessary conditions for the CO 2 conversion reaction. 8…”