The effect of iron hydroxide on nickelous hydroxide electrodes with emphasis on the oxygen evolution reaction

Spectroscopic study of nickel(II) hydroxide surface modifications induced by a small iron(III) addition

“…The absence of Fe at the initial surface of the binary system (3 at.% Fe) studied here must also lead to a lower electrocatalytical activity of the latter in view of the surface-related electrocatalytical activity of iron in binary Ni-Fe hydroxides towards anodic oxygen evolution in alkaline media [5,15,16], which agrees with the experimental data [5].…”

Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

“…[13][14][15][16][17][18] Consequently, a significant body of research exists on the application of non-noble transition metal oxides as OER anodes. Among the most promising materials are various intermetallic alloys, [19][20][21] electrodeposited nickel, [22][23][24][25] cobalt [26][27][28] and manganese oxides, 29 spinels including nickelites, [30][31][32][33] cobaltites [34][35][36] and ferrites, 37,38 perovskites, [39][40][41][42] and hematite photoanodes. 43 An important practical and fundamental factor which should also be noted when considering OER anode materials is that, even in the case of the parent metal, the anodic OER always occurs at an oxidised surface.…”

A comparative study of the oxygen evolution reaction on oxidised nickel, cobalt and iron electrodes in base

“…The oxides of first row transition metals, in particular nickel and cobalt, offer a compromise solution -although they possess inferior electrocatalytic activity for the OER, they display excellent long term corrosion resistance in aqueous alkaline solution and have the added advantage of being relatively inexpensive [1][2][3]. In view of this, nickel hydroxides [1,[4][5][6], spinels (ABO 3 ) including Co 3 O 4 [7][8][9][10], NiCo 2 O 4 [11][12][13][14] and various ferrites [15,16], perovskites (ABO 3 , A is a lanthanide, B is a first row transition metal) [17][18][19][20], and transition metal based amorphous alloys [21][22][23] have all been proposed for OER anode applications. The aforementioned oxides were prepared from inorganic precursor materials using a wide variety of approaches, including, thermal decomposition, spray pyrolysis, sol-gel routes and freeze drying, precipitation or electro-deposition from solution.…”

“…Refs. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] are randomly chosen examples, representative of a much larger body of relatively recent literature on the optimisation of OER anode materials. Despite all this work, the mechanism of the OER at first row transition metal oxide surfaces remains controversial and the question of a possible common mechanism (which would facilitate a theory of electrocatalysis for oxygen evolution) is therefore unresolved.…”

“… (4). and(5), h is the fractional coverage of the electrode surface by [Ni(III)O m+1 (OH) nÀ1 ] pÀ , b is the electron transfer symmetry factor,…”