Nickel Doping in Atomically Thin Tin Disulfide Nanosheets Enables Highly Efficient CO₂ Reduction

Abstract

Engineering electronic properties by elemental doping is a direct strategy to design efficient catalysts towards CO electroreduction. Atomically thin SnS nanosheets were modified by Ni doping for efficient electroreduction of CO . The introduction of Ni into SnS nanosheets significantly enhanced the current density and Faradaic efficiency for carbonaceous product relative to pristine SnS nanosheets. When the Ni content was 5 atm %, the Ni-doped SnS nanosheets achieved a remarkable Faradaic efficiency of 93 % for carbonaceous product with a current density of 19.6 mA cm at -0.9 V vs. RHE. A mechanistic study revealed that the Ni doping gave rise to a defect level and lowered the work function of SnS nanosheets, resulting in the promoted CO activation and thus improved performance in CO electroreduction.

Oxygen Vacancies in Amorphous InOx Nanoribbons Enhance CO2 Adsorption and Activation for CO2 Electroreduction

“…The ranking of the chemical desorption temperature is O‐InO x NRs (323.3 °C) < P‐InO x NRs (364.7 °C) < H‐InO x NRs (389.3 °C and 413.9 °C), which is consistent with the CO 2 adsorption capacity. The enhanced peaks of the H‐InO x NRs at higher temperatures suggest that the introduction of O‐vacancies can significantly promote the chemisorption ability and capability of CO 2 . Hence, according to the above results, we speculate the possible CO 2 ER processes in InO x NRs (Figure e), where the CO 2 molecules achieve the vigorous adsorption and activation process by H‐InO x NRs due to the introduction of O‐vacancy.…”

“…Nevertheless, many factors, such as poor current density, low selectivity and the complexity of reduction products, have largely limited the practical applications of CO 2 ER . In addition, the large reaction energy barriers during CO 2 adsorption and activation processes also have crucial influence on CO 2 ER . To this end, it is significant to design robust electrocatalysts that can efficiently adsorb, activate and convert CO 2 into value‐added products …”

Exploring Bi2Te3 Nanoplates as Versatile Catalysts for Electrochemical Reduction of Small Molecules

“…The double‐layer capacitance ( C dl ) values of the Bi 2 Te 3 NPs/C and the commercial Bi 2 Te 3 /C were initially tested, which is positively correlated with the electrochemical active surface area (ECSA; Figure S5a,c, Supporting Information). [ 33,34 ] As shown in Figure S5b,d in the Supporting Information, the C dl of the Bi 2 Te 3 NPs/C was 16.7 mF cm −2 , which was much higher than that of the commercial Bi 2 Te 3 /C (3.8 mF cm −2 ). Furthermore, the ECSA of the activated Bi 2 Te 3 NPs/C was also measured by the C dl values.…”

Nitrogen‐Doped NiO Nanosheet Array for Boosted Electrocatalytic N2 Reduction

“…The synthesis details are given in the Experimental Section of Supporting Information. The N doping level of N-NiO nanosheets is determined to be 2.9 at % based on the inductively coupled plasma optical emission spectroscopy (ICP-OES) [32,33] . As shown in Figure 1a, X-ray diffraction (XRD) peaks of NiO/CC and N-NiO/CC are both well indexed to the cubic NiO (JCPDS 47-1049), suggesting that N doping does not cause the phase change of NiO.…”