Biowaste-Derived Interconnected Carbon Nanosheet-Supported Iron as a Highly Stable and Excellent Electrocatalyst for Overall Water Splitting

Design strategy of encapsulated nanoplates and nanorods (ID-CoMo): enhanced catalytic activity and sustainability for overall & solar cell water splitting

“…11). 44 In Fig. 12a, ID-CoMo/NF displays superior activity with a cell voltage of 1.55 V to acquire 10 mA cm −2 over to the precious catalyst on Pt–IrO 2 (1.64 mV) and most reported catalysts as shown in Table S1 †.…”

Synergistic construction of an iron nitride embedded graphitic carbon nitride heterostructure electrocatalyst as a potential candidate to accelerate overall water electrolysis

“…This confirms that Fe 3 N@CN-700 is a hollow cube electrocatalyst, corroborating the expectation from HR-TEM observations, which would significantly facilitate the electrocatalytic activity by enabling higher diffusion rates of reactants as well as product gas dissipation from the surface. 23…”

“…In summary, the synergistic construction of a Fe 3 N@CN-700 catalyst for superior overall water splitting performance may be attributed to the following aspects: (i) the unique morphology of the iron nitride embedded graphitic carbon nitride heterostructure provides excellent electrical conductivity, reduces the interfacial interaction between the reaction intermediates and ubiquitous electrochemical surface area speeds up the reaction kinetics; 33,34,49 (ii) partial oxidation of iron nitride to an FeOOH active layer on the Fe 3 N@CN-700 (FeOOH/Fe 3 N@CN-700) catalyst during the electrochemical process effectively promotes the OER process; 64–66 (iii) the iron nitride associated with the graphitic carbon nitride heterostructure is an active promoter for the HER process because the nitrogen site trapped the hydrogen near iron sites and it could assist the hydrogen evolution 32 and (iv) the graphitic carbon nitride not only promotes electron transportation but also acts as a protective layer for iron nitride from electrochemical corrosion and long-term catalyst stability. 23,32…”

“…19–21 For the OER process, first row transition oxy-hydroxides of Fe, Ni, Co and Mn elements have been extensively employed. 22–25 Although iron has become the foremost transition metal in this era owing to its natural abundance, environmental friendliness, low cost and promising OER and HER activity, related electrocatalytic findings are occasionally reported. 13,26 Designing transition metal nitrides with suitable stoichiometric composition of metal to nitrogen and the nature of supportive materials can improve the surface area, effective electrical charge transportation and electronic structure to enhance the catalyst's synergistic performance.…”