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Wim Bras DUBBLE @ ESRF Netherlands Organisation - Big Science

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• Some atoms get disconnected due to the<br />

hydrogen treatment<br />

• They re-attach predominantly to larger<br />

particles<br />

• The large particles grow at the expense of the<br />

small ones (Ostwald ripening)<br />

• Conclusion: loss of active catalytic surface<br />

Only with EXAFS we can see what happens with the smallest particles

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