Highly Active, Durable Ultrathin MoTe₂ Layers for the Electroreduction of CO₂ to CH₄

Abstract

The electroreduction of CO to CH is a highly desirable, challenging research topic. In this study, an electrocatalytic system comprising ultrathin MoTe layers and an ionic liquid electrolyte for the reduction of CO to methane is reported, efficiently affording methane with a faradaic efficiency of 83 ± 3% (similar to the best Cu-based catalysts reported thus far) and a durable activity of greater than 45 h at a relatively high current density of 25.6 mA cm (-1.0 V ). The results obtained can facilitate research on the design of other transition-metal dichalcogenide electrocatalysts for the reduction of CO to valuable fuels.

Rh2S3/N‐Doped Carbon Hybrids as pH‐Universal Bifunctional Electrocatalysts for Energy‐Saving Hydrogen Evolution

“…First, as for ECSA, the distinction of structural and chemical composition between Rh 2 S 3 /NC and Rh 2 P contributed weak adsorption behaviors of H and CO species on the surface of Rh 2 S 3 / NC ( Figure S3, Supporting Information), and thereby leading to the failure ECSA evaluation of Rh 2 S 3 /NC via the HUPD or CO-stripping methods, and ECSA values were evaluated by double-layer capacitance test ( Figure S4, Supporting Information) due to the similar interference brought out by the similarity in carbon content in Pt/C and Rh 2 S 3 /NC. [40][41][42][43][44][45][46] As compared to Pt/C, the Rh 2 S 3 /NC possessed over twice higher C dl value (31 mF cm -2 ), indicating more active sites and excellent intrinsic property in the Rh 2 S 3 /NC electrode ( Figure S5, Supporting Information). [8] The results of j 0 , TOF, and j ECSA were 1.61 mA cm −2 , 1.647 H 2 s −1 at η = 100 mV, 10 mA cm −2 at η = 207 mV, respectively, all of which is comparable to or superior to those of highly efficient reported HER catalysts ( Figure S6, Tables S2 and S3, Supporting Information), conveying the superior intrinsic catalytic performance of Rh 2 S 3 / NC for alkaline HER.…”

DFT Comparison the Performance of Pd10Sn5 and Pd10Ag5 Electrocatalyst for Reduction of CO2

“…For equation 16, we choose to apply some approximations. First, S e is approximately zero at the fundamental electronic level, and secondly, for the gas, translation, rotation, and vibration entropy terms, there may be a contribution that may not be ignored, therefore: S = S t + S r + S v , but for solids and adsorbates, S t ≈ 0 and S r ≈ 0, therefore: S = S v .…”

“…Thus, many experimental and theoretical studies have extensively developed high‐performance electrochemical catalyst systems for CO 2 conversion to achieve a minimized overpotential, improved product selectivity, improved stability, etc 11–14 . And CO 2 is reduced to various products based on a multielectron transfer mechanism 15, 16 . The main target products are often classified into C1 product (e.g., CO, CH 4 , CH 3 OH, and HCOOH, etc.)…”

Hybridization of Defective Tin Disulfide Nanosheets and Silver Nanowires Enables Efficient Electrochemical Reduction of CO2 into Formate and Syngas

“…In common, the CO 2 electrochemical reduction generally requires high overpotential to overcome the barrier for CO 2 activation, which induced low current density and large energy loss . Given that the CO 2 activation was closely associated with the number and intrinsic activity of active sites, many researchers have tailored the active sites of electrocatalysts for enhanced CO 2 electrochemical reduction . The defect engineering represents a straightforward means to manipulate the active sites of catalysts .…”