Towards a better Sn: Efficient electrocatalytic reduction of CO 2 to formate by Sn/SnS 2 derived from SnS 2 nanosheets

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

“…Meanwhile, it should be noted that the obtained Tafel slope of the ultrathin MoTe 2 electrode is 68 mV dec −1 , very close to the theoretical one. Moreover, previous work on the transition‐metal dichalcogenides (such as CuS, MoSeS, and SnS 2 ) has confirmed the CO 2 electroreduction takes place on metal atoms. Therefore, we can consider that the CO 2 electroreduction to CH 4 on MoTe 2 also involves the above steps including the RLS.…”

Promises of Main Group Metal–Based Nanostructured Materials for Electrochemical CO2 Reduction to Formate

“…The electrochemical reduction of SnS x would give rise to metallic Sn with residual surface sulfide that may similarly facilitate CO 2 RR. For instance, Zhang and co‐workers prepared SnS 2 nanosheets supported on reduced graphene oxide (SnS 2 /rGO) via a facile hydrothermal method, and observed that SnS 2 was only partially transformed to metallic Sn under cathodic potentials . The thus‐derived Sn/SnS 2 /rGO was believed to stabilize the adsorption of * CO 2 •− intermediate and therefore enhance the CO 2 RR performance.…”

Engineering Electronic Structure of Stannous Sulfide by Amino‐Functionalized Carbon: Toward Efficient Electrocatalytic Reduction of CO2 to Formate

“…High‐angle annular dark‐field scanning transmission electron microscopy (HAAD‐STEM) elemental mappings (Figure h–k) demonstrate S, Sn, C, and N elements are homogenously distributed in the whole SnS/Aminated‐C nanotubes. As evidenced by X‐ray photoelectron spectroscopy (XPS) spectra of Sn 3d (Figure m), the binding energies of 494.7 and 486.3 eV are observed for Sn 3d 3/2 and Sn 3d 5/2 , which indicates that Sn is completely in the form of Sn 2+ without Sn 4+ (SnS 2 , SnO 2 ) and Sn 0+ (metallic Sn) . Additionally, these characteristic peaks in Raman spectra (Figure S3, Supporting Information) at 157, 223, 1356, and 1572 cm −1 are assigned to the B 3g and A g mode of SnS, the D‐band and G‐band of Aminated‐carbon, confirming the existence of SnS and carbon layers .…”

“…First, the p‐orbital DOS of the N 2p in SnS/Aminated‐C shows that less antibonding orbitals are occupied after adsorbing OCHO* (Figure S14, Supporting Information), which suggests that the catalyst is favorable for OCHO* binding. Second, N is a typical p‐block element, with only one electron occupied in each p orbital, which can effectively stabilize the electrons of the 2p z orbital for C in the CO 2 * and OCHO* intermediates, resulting in a better adsorption property for CO 2 * and OCHO* . Above all, a significant synergistic effect between SnS and amino‐functionalized carbon layers in enhancing the adsorption energies of CO 2 * and OCHO*intermediate and accelerating the charge transfer rate, boosting the electrocatalytic reduction of CO 2 to formate.…”