TY - JOUR
T1 - Unlocking the catalytic potential of nickel sulfide for sugar electrolysis
T2 - green hydrogen generation from kitchen feedstock
AU - Patil, Supriya A.
AU - Khot, Atul C.
AU - Kadam, Kalyani D.
AU - Bui, Hoa Thi
AU - Im, Hyunsik
AU - Shrestha, Nabeen K.
N1 - Publisher Copyright:
© 2023 The Royal Society of Chemistry
PY - 2023/10/10
Y1 - 2023/10/10
N2 - Amongst the various food ingredients available in our kitchen, table sugar is commonly associated with satisfying our sweet cravings and serving as a fundamental source of energy in the form of glucose for powering cellular activities and various biological processes. Interestingly, sugar can be electrolyzed in an aqueous solution, oxidizing into value-added chemicals at the anode while producing hydrogen at the cathode. However, developing cost-effective and highly active electrocatalysts for sugar and/or glucose electrolysis remains a significant challenge. This work presents solution-processed nickel sulfide nanowires on a nickel foam substrate (Ni7S6/NF) as a promising electrocatalyst for the glucose oxidation reaction (GOR), achieving electrolysis currents of 10, 100, and 400 mA cm−2 at anodic potentials of 1.30, 1.41 and 1.45 V vs. RHE, respectively. These anodic potentials, compared to the conventional OER potentials, are lowered by 140, 190 and 230 mV, respectively. Additionally, table sugar and orange juice are also electrolyzed to realize competitive hydrogen generation. By assembling a two-electrode (Ni7S6/NF∥Ni7S6/NF)-based electrolyzer and feeding table sugar as the key electrolyte in 1.0 M KOH aqueous solution, a remarkable result exhibiting a cell voltage lowered by 170 mV compared to that required for conventional alkaline water (1.0 M KOH aqueous solution) splitting to achieve an electrolysis current density of 100 mA cm−2 is obtained. In addition, the Ni7S6/NF catalyst exhibits outstanding stability for 24 h during sugar electrolysis.
AB - Amongst the various food ingredients available in our kitchen, table sugar is commonly associated with satisfying our sweet cravings and serving as a fundamental source of energy in the form of glucose for powering cellular activities and various biological processes. Interestingly, sugar can be electrolyzed in an aqueous solution, oxidizing into value-added chemicals at the anode while producing hydrogen at the cathode. However, developing cost-effective and highly active electrocatalysts for sugar and/or glucose electrolysis remains a significant challenge. This work presents solution-processed nickel sulfide nanowires on a nickel foam substrate (Ni7S6/NF) as a promising electrocatalyst for the glucose oxidation reaction (GOR), achieving electrolysis currents of 10, 100, and 400 mA cm−2 at anodic potentials of 1.30, 1.41 and 1.45 V vs. RHE, respectively. These anodic potentials, compared to the conventional OER potentials, are lowered by 140, 190 and 230 mV, respectively. Additionally, table sugar and orange juice are also electrolyzed to realize competitive hydrogen generation. By assembling a two-electrode (Ni7S6/NF∥Ni7S6/NF)-based electrolyzer and feeding table sugar as the key electrolyte in 1.0 M KOH aqueous solution, a remarkable result exhibiting a cell voltage lowered by 170 mV compared to that required for conventional alkaline water (1.0 M KOH aqueous solution) splitting to achieve an electrolysis current density of 100 mA cm−2 is obtained. In addition, the Ni7S6/NF catalyst exhibits outstanding stability for 24 h during sugar electrolysis.
UR - http://www.scopus.com/inward/record.url?scp=85174392373&partnerID=8YFLogxK
U2 - 10.1039/d3qi01686b
DO - 10.1039/d3qi01686b
M3 - Article
AN - SCOPUS:85174392373
SN - 2052-1545
VL - 10
SP - 7204
EP - 7211
JO - Inorganic Chemistry Frontiers
JF - Inorganic Chemistry Frontiers
IS - 24
ER -