“Green” electrochemical synthesis of Pt/graphene sheet nanocomposite film and its electrocatalytic property

Synthesis of graphene/methylene blue/gold nanoparticles composites based on simultaneous green reduction, in situ growth and self-catalysis

“…1a) shows the broad peak at 3398 cm -1 which is assigned to the O-H stretching vibration. The other characteristic absorption peaks at 1727, 1219, and 1052 cm -1 which correspond to the stretching of C=O (carbonyl), C-OH, and C-O (alkoxy) bonds, respectively, are also observed [35,44]. All these peaks serve as the evidence for the existence of oxygen-containing groups on GO.…”

“…To date, most composites that combine rGO with AuNPs were synthesized through co-reduction of the precursors, chloroauric acid (HAuCl 4 ) and GO, by chemical reductants, such as sodium borohydride (NaBH 4 ) and hydrazine (N 2 H 4 ) [32][33][34]. Although this method is popular, its primary disadvantage is the use of highly toxic reductants (NaBH 4 , N 2 H 4 ) [35]. This problem has prompted researchers to explore new and green reductants to realize the co-reduction of the precursors, instead of NaBH 4 or N 2 H 4 [35,36].…”

“…Although this method is popular, its primary disadvantage is the use of highly toxic reductants (NaBH 4 , N 2 H 4 ) [35]. This problem has prompted researchers to explore new and green reductants to realize the co-reduction of the precursors, instead of NaBH 4 or N 2 H 4 [35,36]. The use of environment-friendly ethylene glycol and ascorbic acid (AA) as green reductants for GO and noble metal precursors has been reported as an alternative method [36,37].…”

Carbon-Based Nanomaterials

“…This discovery led to an explosion of interest, and much research has been conducted on the structure and property characterization of graphene [136][137][138][139]. The combination of the high surface area (2,630 m 2 g -1 ) and high conductivity makes graphene sheets a promising candidate as low temperature fuel cell catalyst support.…”

“…In the first case, metal precursors are deposited on GO and then are reduced simultaneously with different reducing agents such as ethylene glycol, [156][157][158][159] NaBH 4 [160], PVP/ hydrazine, [161] sodium citrate, [162] microwave heating [163], and microwave polyol synthesis [164,165]. Another synthesis method consists in the electrochemical reduction of GO, following by the electrochemical deposition of nanoparticles [137].…”