Facile surface reconstructions of cobalt–copper phosphide heterostructures enable efficient electrocatalytic glycerol oxidation for energy-saving hydrogen evolution

Abstract

Glycerol oxidation reaction (GOR) affords an energetically more favorable route for assisted H2 production compared to oxygen evolution reaction, with concurrent anodic value-added chemical generation. Herein, the self-supported CoP-Cu3P composite...

Electrooxidation of the Glycerol Derivative Solketal over Cu−Co Hydroxycarbonates to Enable the Synthesis of Glyceric Acid

“…Overall, the GOR electrocatalytic activity of the reported bimetallic Cu and Co catalysts was higher in strong alkaline electrolyte, compared to the monometallic ones [4,24–26] . Still, several reports indicate a partial Co enrichment of the catalyst surface during the electrochemical experiments [25] …”

“…proved that the mixed Co and Cu phosphide (CoP‐Cu 3 P) catalyst showed a higher GOR electrocatalytic activity than the monometallic CoP and Cu 3 P. Using CoP‐Cu 3 P, only a potential of 1.13 V vs. RHE was required to reach the current density of 10 mA/cm 2 , and formic acid and oxalic acid were the main products. Overall, the GOR electrocatalytic activity of the reported bimetallic Cu and Co catalysts was higher in strong alkaline electrolyte, compared to the monometallic ones [4,24–26] . Still, several reports indicate a partial Co enrichment of the catalyst surface during the electrochemical experiments [25] …”

“…Cu and Co bimetallic catalysts emerged as potential GOR electrocatalysts in the last years, with studies conducted using Cu‐ and Co‐based oxides, [4,22–24] phosphides, [25] and hydroxycarbonates [26] . Han et al [4] .…”

“…We recently used solketal, a primary monoalcohol derived from glycerol by its ketalization with acetone, to promote glyceric acid formation over Ni-based electrocatalysts. [21] Cu and Co bimetallic catalysts emerged as potential GOR electrocatalysts in the last years, with studies conducted using Cu-and Co-based oxides, [4,[22][23][24] phosphides, [25] and hydroxycarbonates. [26] Han et al [4] showed that the combination of Co with Cu in a series of Co-based spinel oxides with different transition metals has the highest GOR activity, along with high selectivity for formic acid.…”

“…[26] Han et al [4] showed that the combination of Co with Cu in a series of Co-based spinel oxides with different transition metals has the highest GOR activity, along with high selectivity for formic acid. In addition, Xie et al [25] proved that the mixed Co and Cu phosphide (CoP-Cu 3 P) catalyst showed a higher GOR electrocatalytic activity than the monometallic CoP and Cu 3 P. Using CoP-Cu 3 P, only a potential of 1.13 V vs. RHE was required to reach the current density of 10 mA/cm 2 , and formic acid and oxalic acid were the main products. Overall, the GOR electrocatalytic activity of the reported bimetallic Cu and Co catalysts was higher in strong alkaline electrolyte, compared to the monometallic ones.…”