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Ir nanodendrites on ATO for acid OER
TTAB-grown Ir nanodendrites on mesoporous ATO outperform Ir black for oxygen evolution in acid and in a PEM electrolyzer.
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What reaction is Ir-ND designed to catalyze?
Acidic oxygen evolution in PEM water electrolyzers.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
How are Ir nanodendrites grown?
NaBH4 reduction of H2IrCl6 in TTAB water at 70 °C.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
What TEM size range is reported?
15–20 nm dendritic particles.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
What lattice spacing matches Ir(111)?
0.22 nm.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
How do BET areas compare?
Ir-ND 39.2 m2 g–1 versus Ir black 18.2 m2 g–1.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
What electrochemical porosity is reported for Ir-ND?
34.2%, 1.7 times Ir black’s 20%.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
What oxide support is used?
High-surface-area antimony-doped tin oxide (ATO).
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
OER activity ranking after break-in?
Ir black ≪ Ir/C ≪ Ir-ND < Ir-ND/C < Ir-ND/ATO.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
How much more mass-active is Ir-ND than Ir black at 1.51 V?
Eight times.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
What PEMWE current does Ir-ND/ATO reach at 1.8 V?
1.50 A cm–2 versus 0.80 A cm–2 for Ir black.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified
Which catalyst was most durable in 15 h holds?
Ir-ND/ATO, thanks to corrosion-resistant ATO.
Source: Oxide-supported Ir nanodendrites with high activity and durability for the oxygen evolution reaction in acid PEM water electrolyzers · DOI · quote verified