A Facile Route to Fabricate Effective Pt/IrO2 Bifunctional Catalyst for Unitized Regenerative Fuel Cell

Rational design of mesoporous NiFe-alloy-based hybrids for oxygen conversion electrocatalysis

“…12,[27][28][29][30] Moreover, Ir-and Pt-based materials, which are probably the best electrocatalysts for OER and ORR, are rare and precious substances and suffer from the drawbacks of high cost and declining activity over long-term operation, limiting their practical applications. [31][32][33][34][35][36] To date, the development of bifunctional nanocatalysts for OER and ORR is still in its infancy, [37][38][39][40][41][42][43][44] and there is abundant room for the exploration of novel electrocatalysts. 45,46 We herein report an alloy-based electrocatalyst for OER and ORR through a rational and elaborate design, featuring the advantages of easy preparation, low cost, enhanced reaction rate, reduced overpotential, good durability, and enhanced energy conversion efficiency.…”

Preparation of IrO2 nanoparticles with SBA-15 template and its supported Pt nanocomposite as bifunctional oxygen catalyst

“…Of all these problems, the bifunctional oxygen catalyst (BOC) is at the heart of the URFC technologies, which promotes both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), but usually shows irreversible oxygen redox reactions (involve complex oxygen species, O 2À , O 2 2À , O, O À , O 2 - [6,7]). The present challenge to fabricate BOC is to endow them with such properties as considerably high catalytic activity, long-term stability, and excellent ability of anti-corrosion against both acidic medium and high potential [8e10].…”

Bifunctional Catalysts for Reversible Oxygen Evolution Reaction and Oxygen Reduction Reaction

“…The difference of mechanism of OER and ORR actually makes these materials difficult to buffer both reactions. Thus, composites, noble‐metal‐based materials or first‐row transition metal mixtures, show significantly higher bifunctional performance . Tuning the composite oxides composition and structures actually could achieve a high ORR activity with the E 1/2 normally higher than 0.8 V, and the j 10 for OER can be lower than 1.6 V, leading the composites could achieve a wild Δ E in the range of 0.66 to 1.16 V depends on their combinations.…”