Ruthenium oxychloride supported by manganese oxide for stable oxygen evolution in acidic media

Abstract

Despite the recent advances in enhancing the durability and reducing the overpotential of ruthenium (Ru)-based electrocatalysts for acidic oxygen evolution reaction (OER), their stability hardly meets the requirement of practical...

Fiber-in-tube RuxCr1−xOy as highly efficient electrocatalysts for pH-universal water oxidation via facile bubble desorption

“…Furthermore, the OER performance of Ru x Cr 1− x O y _20 was better and comparable to those of previously reported Ru-based electrocatalysts under acidic, neutral, and alkaline conditions, as shown in Fig. 3g–i and Tables S6–S8 † 16,18,43,54–73 . The OER catalytic properties of Ru x Cr 1− x O y _20 were also compared with those of other very recently reported catalysts without Ru in Table S9 † 74,75 .…”

“…3g-i and Tables S6-S8. † 16,18,43,[54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73] The OER catalytic properties of Ru x Cr 1−x O y _20 were also compared with those of other very recently reported catalysts without Ru in Table S9. † 74,75 Here, we pose a question regarding how changes in Cr content within the Ru x Cr 1−x O y series affect their pH-universal OER activity.…”

Electrocatalysts for the Oxygen Evolution Reaction in Acidic Media

“…The carbon additive plays a major role for enhancing the conductivity, which efficiently benefits the catalytic performance of OER electrocatalysts, especially for those with poor conductivity. On the other hand, carbon-based electrocatalysts, such as metal/metal oxide species supported or bonded on carbon matrix, [166,170,201,[302][303][304][305][306] heteroatom-doped carbon materials, [174,[187][188]193,201] graphene, [307,308] CNT, [309] are designed for the acidic OER catalysis (as listed in Table 1). It is known that carbon has been widely utilized in fuel cell because carbon oxidation is very slow under the typical operations with low potential (<0.8 V).…”

Recent Progress in Ruthenium-Based Electrocatalysts for Water Oxidation under Acidic Condition

“…30,31 The cheaper Ru metal or RuO 2 generally shows higher OER activity than Ir-based electrocatalysts, which results from the more appropriate binding energy of intermediates. 180 However, the poor acidic OER stability of Ru metal and RuO 2 is the biggest barrier for their commercial application. Accordingly, developing other highly active and stable Ru-based OER electrocatalysts is significant to the commercial application of PEMWE.…”

“…Li and co-workers synthesized Ru oxychloride active species into a manganese oxide support (RuOCl@MnO x ) as polycrystalline and amorphous composite with highly dispersed Ru-O−Mn for OER. 180 One of the distinguishing features of this catalyst was the stable operation over 280 h with an overpotential of 228 mV at 10 mA cm −2 and over 200 h at 100 mA cm −2 in acid. Ru atoms dispersion phenomenon into MnO x resulted in a high oxidation potential with higher valence state, also stable for suppressing oxidative corrosion.…”