Cu_xNi_y alloy nanoparticles embedded in a nitrogen–carbon network for efficient conversion of carbon dioxide

Abstract

CuxNiy alloy nanoparticles embedded in a nitrogen–carbon network can effectively convert CO2 into CO under mild conditions.

Confining Chainmail‐Bearing Ni Nanoparticles in N‐doped Carbon Nanotubes for Robust and Efficient Electroreduction of CO2

“…In Ni 2p XPS, Ni@NC@NCNT exhibited six components (Figure 3a). Those centered at 852.7 and 870.9 eV were assigned to Ni 0 2p 3/2 and 2p 1/2 , respectively, consistent with the XRD and TEM results [34,66–69] . The two shoulder peaks located at higher binding energies of 858.4 and 879.9 eV were ascribed to the satellite peaks, which were common in Ni‐based nanomaterials [34,66,69] .…”

“…Moreover, the pyridinic N content for Ni@NC@NCNT was second only to NCNT, thus implying its better CO 2 RR performance. In C 1s XPS, Ni@NC@NCNT showed four peaks at 284.7, 285.5, 286.1, and 289.2 eV, which were attributed to C−C/C=C, C−N, C−O and O−C=O bonds, respectively (Figure 3c) [67,71,72] . The detection of C−N bonds conclusively demonstrated that the encapsulated carbon layers and nanotubes were doped with N, further corroborating the elemental mapping results (Figure 1g) and N 1s XPS analyses (Figure 3b).…”

“…Such durability was much better than Ni@NC/NCNT, Ni@NC and NCNT (Figure S7c and d). More importantly, our catalyst surpassed most state‐of‐the‐art CO‐selective catalysts in terms of long‐term durability in CO 2 RR (Figure 4f and Table S7) [16,17,19,26,33–35,37,60,66,67,69,72,76–94] . These unambiguously demonstrated the advantage of the dual chainmail structure in reinforcing the catalyst and boosting the CO 2 RR performance.…”

“…Moreover, it exhibited higher current densities in CO 2 ‐saturated electrolytes than Ni@NC/NCNT, Ni@NC and NCNT (Figure 4b). Particularly, current densities of 18.9 and 48.0 mA cm −2 were afforded at −0.75 and −1.10 V, respectively, substantially higher than or comparable to most state‐of‐the‐art catalysts (Figure 4b and Table S7), [26,33,67,72,76,77] implying the advantage of the dual chainmail structures.…”

Hydrophobic thiol coatings to facilitate a triphasic interface for carbon dioxide reduction to ethylene at gas diffusion electrodes

“…For instance, CO 2 reduction to carbonaceous fuels such as methane, methanol or formic acid could be combined with intermittent green energy sources to provide energy security during off peak generation. [2][3][4] Alternatively, the primary target could be an industrially relevant material, such as CO [5][6][7] or C 2 H 4 , [8][9][10] which are usually sourced from fossil fuels. The CO 2 RR route to these species offers a twofold benet, since CO 2 is consumed in their production and it lessens the demand for fossil fuel consumption.…”